This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, books slid off when Maya carried them to the rug, so Maya and Chen built a tray with raised edges to keep them in place. They built the model using a shallow box, cardboard strips, and tape and shaped it to have raised edges on all four sides. When they tested it, they put books on the tray and walked, and the books stayed on without sliding off. Choice B is correct because it accurately identifies the shape feature of raised edges and correctly connects to the observed function of keeping books from falling off, including evidence from the demonstration where the edges acted like walls during walking. For example, the raised edges formed barriers and when books were carried on the tray around the classroom the edges prevented them from sliding off. Choice A represents wrong function attributed. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, books slid off when Chen carried them to the rug, so Chen and Sofia built a tray by taping cardboard strips around the edges of a shallow cereal box; they built the model using a shallow cereal box, cardboard strips, and tape and shaped it to have raised edges on all four sides. When they tested it, they put three books on the tray and walked slowly, and the books stayed on the tray and did not slide off. Choice A is correct because it accurately identifies the shape feature of raised edges, correctly connects to the observed function of keeping books from sliding off, and includes evidence from the demonstration where books stayed on during walking. For example, the raised edges formed barriers and when the tray was carried the edges prevented the books from sliding off. Choice B represents an error focusing on material instead of shape function, such as thinking cardboard makes books lighter rather than edges containing them. This error typically occurs when students notice materials but not shape, describe process instead of function, or don't connect model testing results to shape's role. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, water spilled when Carlos poured into a small bottle, so Carlos and Keisha built a funnel with a wide top narrowing to a point to guide the water. They built the model using paper, tape, a bottle, and a cup of water and shaped it to have a cone with wide top and narrow bottom. When they tested it, they poured water into the wide top over the bottle and it went in with less spilling. Choice A is correct because it accurately identifies the shape feature of wide top and narrow bottom and correctly connects to the observed function of guiding water into the bottle, including evidence from the demonstration where water flowed without much spill. For example, the wide top narrowing to point directed the water and when poured, it entered the bottle as shown in testing. Choice B represents aesthetic reasoning. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, markers kept rolling off the table, so Jamal and Sofia built a holder with round openings to keep them in place. They built the model using cardboard, tape, scissors, and markers and shaped it to have three round openings in a flat cardboard strip. When they tested it, they put each marker into a round opening and tilted the holder a little, but the markers stayed in place. Choice A is correct because it accurately identifies the shape feature of round openings and correctly connects to the observed function of holding markers so they do not roll away, including evidence from the demonstration where the openings held the round markers during tilting. For example, the round openings matched the markers' shape and when tilted the holder, the markers did not roll away as shown in testing. Choice B represents a material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, water spilled when Carlos poured into a small bottle, so Carlos and Keisha built a funnel with a wide top narrowing to a point to guide the water. They built the model using paper, tape, a bottle, and a cup of water and shaped it to have a cone with wide top and narrow bottom. When they tested it, they poured water into the wide top over the bottle and it went in with less spilling. Choice A is correct because it accurately identifies the shape feature of wide top and narrow bottom and correctly connects to the observed function of guiding water into the bottle, including evidence from the demonstration where water flowed without much spill. For example, the wide top narrowing to point directed the water and when poured, it entered the bottle as shown in testing. Choice B represents aesthetic reasoning. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, Amir could not reach the top shelf for tissues, so Amir and Maya built a platform by stacking sturdy boxes and blocks with a flat cardboard top; they built the model using sturdy boxes, blocks, a flat piece of cardboard, and tape and shaped it to have a flat top surface and a wide base. When they tested it, they stood on the flat top and reached again, and Amir could reach higher than before. Choice A is correct because it accurately identifies the shape feature of the flat top surface, correctly connects to the observed function of letting Amir stand to reach higher, and includes evidence from the demonstration where standing on it allowed reaching the shelf. For example, the flat top provided a stable surface and when stood on it helped reach items that were too high before. Choice B represents a decorative focus instead of shape function, such as thinking tape color helps find it rather than the flat top supporting standing. This error typically occurs when students focus on non-functional aspects, think decorative and functional features are equally important, or ignore evidence from testing. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, Carlos could not reach the class calendar, so Carlos and Emma built a platform by stacking blocks and adding a flat book cover top; they built the model using blocks, a sturdy box, a flat book cover, and tape and shaped it to have a flat top surface to stand on. When they tested it, they stood on the flat top and pointed to the calendar, and Carlos could reach it without jumping. Choice A is correct because it accurately identifies the shape feature of flat top surface, correctly connects to the observed function of letting you stand and reach higher, and includes evidence from the demonstration where standing on it allowed reaching the calendar. For example, the flat top provided support and during testing helped reach without jumping. Choice B represents an error focusing on material instead of shape function, such as thinking tape is best for reaching rather than the flat top supporting. This error typically occurs when students notice materials but not shape, describe process instead of function, or don't connect model testing results to shape's role. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, pencils and erasers got mixed up in one bin, so Emma and Amir built a box with cardboard dividers to keep them separated. They built the model using a shoebox, cardboard strips, and tape and shaped it to have dividers creating three sections. When they tested it, they placed pencils in one section and erasers in another, shook the box gently, and the items stayed separated. Choice A is correct because it accurately identifies the shape feature of dividers and correctly connects to the observed function of making sections that keep items separated, including evidence from the demonstration where items did not mix during shaking. For example, the dividers created separate compartments and when supplies were placed in different sections they stayed separated during the test. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, Yuki could not reach the paper towels on a high shelf, so Yuki and Marcus built a platform with a flat raised top to stand higher. They built the model using blocks, small boxes, cardboard, and tape and shaped it to have a flat top raised about 6 inches. When they tested it, they stood on the flat top near the shelf and Yuki could reach the paper towels. Choice A is correct because it accurately identifies the shape feature of the flat raised top and correctly connects to the observed function of letting Yuki stand higher to reach, including evidence from the demonstration where the surface provided stable support. For example, the flat top surface provided a stable platform and when student stood on it they could reach items that were too high before. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.

This question tests the 1st grade skill of developing a simple physical model to show how the shape of an object helps it function as needed to solve a problem (K-2-ETS1-2: Develop a physical model to illustrate how the shape of an object helps it function). A physical model is something we actually build (not just draw) to test our design ideas. Building a model lets us see if the shape we planned actually works to solve the problem. When we build and test a model, we can observe how the shape features function: we can see dividers actually separating items, feel a flat surface providing stable support, watch edges preventing things from falling, observe openings holding specific objects. Testing the model gives evidence about whether the shape helps it work as needed. The shape of an object determines what it can do - round shapes roll, flat shapes provide surfaces, edges create barriers, dividers create sections. In this scenario, crayons and glue sticks got mixed in one bin, so Chen and Emma built a box with dividers to make separate sections. They built the model using a cereal box, cardboard strips, and tape and shaped it to have four compartments with dividers. When they tested it, they put crayons in one compartment and glue sticks in another, moved the box, and items stayed separated. Choice A is correct because it accurately identifies the shape feature of dividers and correctly connects to the observed function of making separate sections so items do not mix, including evidence from the demonstration where items stayed in compartments during movement. For example, the dividers created separate compartments and when supplies were placed in different sections they stayed separated during the test. Choice B represents material focus instead of shape function. This error typically occurs when students notice materials but not shape, describe process instead of function, focus on non-functional aspects, describe shape generally without connecting to how it works, don't connect model testing results to shape's role, think decorative and functional features are equally important, confuse what different shapes do. To help students understand physical models and shape-function: Build and test simple models, explicitly discuss 'what shape feature?' and 'how does that shape help it work?'; demonstrate how changing shape changes function (tray without edges vs. with edges); emphasize testing shows whether shape works (evidence-based); connect model features to testing results; use concrete language about shapes and their jobs. Watch for: students who describe materials instead of shape, who build but can't explain how shape helps, who focus on decorative elements instead of functional shape, who describe shape but don't connect to problem-solving, who ignore evidence from testing, or who think building skill matters more than functional design. Key concepts: (1) physical model = actually built to test, (2) shape features have functions (dividers separate, edges contain, flat tops support, etc.), (3) testing shows if shape works, (4) evidence from testing tells us if shape solves problem.