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Award-Winning Grammar Tutors
Certified Tutor
9+ years
Jai
Scoring a 1590 on the SAT meant Jai couldn't afford grammar mistakes on the Writing section, so he internalized the rules governing subject-verb agreement, parallelism, modifier placement, and comma usage at a granular level. He breaks grammar down into a decision tree: a small set of patterns that ...
Stanford University
Bachelors in Electrical Engineering and Computer Science
Certified Tutor
Kate
Kate treats grammar as a logical system rather than a list of arbitrary rules, breaking down sentence structure the way an engineer might break down a schematic. She's particularly sharp on the mechanics that trip up student writers most often: comma splices, subject-verb agreement in complex senten...
Massachusetts Institute of Technology
Masters, Environmental Engineering
Massachusetts Institute of Technology
Bachelors
Certified Tutor
As one of the first freshmen accepted into Penn's certified writing tutor program, Jessica spent years giving detailed feedback on sentence structure, punctuation, and usage. She unpacks grammar rules — subject-verb agreement, comma splices, dangling modifiers — by showing students how each rule sha...
Nova Southeastern University
PHD, Medicine
University of Pennsylvania
Bachelors, History
University of Pennsylvania
undergraduate
Certified Tutor
6+ years
Rhea
Scoring a 1550 SAT and 36 ACT required Rhea to master the grammar rules that standardized tests love to exploit — comma splices, subject-verb agreement across long modifiers, and parallel structure in complex sentences. She breaks these patterns down into clear, repeatable rules so students can spot...
University of Chicago
Bachelor of Science, Biology, General
Certified Tutor
Erika
Comma splices, dangling modifiers, subject-verb agreement — Erika zeroes in on the specific grammar patterns a student keeps tripping over rather than rehashing rules they already know. Her experience editing college essays and teaching SAT Writing gives her a sharp eye for the errors that cost poin...
Harvard University
Master of Public Policy, Public Policy
Certified Tutor
6+ years
Jeffrey
Clear technical writing demands precise grammar, and Jeffrey has spent years refining that skill through research papers, grant applications, and academic publications in his engineering PhD program. He digs into the mechanics that trip students up most — subject-verb agreement in complex sentences,...
University of Notre Dame
Bachelor of Science
Rice University
Doctor of Philosophy, Mechanical Engineering
Certified Tutor
10+ years
Earnest
Sentence structure follows rules as logical as any equation, and Earnest teaches grammar with that same clarity — breaking down when to use semicolons versus em dashes, how subordinate clauses function, and why parallel structure makes writing stronger. His 1530 SAT score reflects sharp command of w...
University of Pennsylvania
Masters, Chemical and Biomolecular Engineering
University of Pennsylvania
Bachelors, Chemical and Biomolecular Engineering
Certified Tutor
Charles
Mechanical engineering reports demand precise, unambiguous writing, so Charles has developed a practical grip on grammar that goes beyond labeling parts of speech. He teaches rules like subject-verb agreement, comma usage in complex sentences, and pronoun-antecedent clarity by showing students how u...
Yale University
Bachelor of Science, Mechanical Engineering
Certified Tutor
10+ years
Samantha
Strong grammar isn't about memorizing rules — it's about recognizing patterns like parallel structure, modifier placement, and subject-verb agreement in context. Samantha sharpened her grammar instruction through years of SAT and ACT prep tutoring, where a misplaced comma or dangling modifier can co...
Duke University
Bachelors in Global Health Determinants, Behaviors, and Interventions
Harvard Medical School
Current Grad Student, MD
Certified Tutor
9+ years
Annie
Medical school demands precise, unambiguous writing — every case report and research summary Annie produces requires airtight grammar. She brings that same attention to sentence structure, punctuation, and usage rules, showing students how to spot errors like dangling modifiers or comma splices by u...
University of California Los Angeles
Bachelors, Physiological Sciences
Drexel University College of Medicine
Current Grad Student, MD
Top 20 English Subjects
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Matthew
Pre-Algebra Tutor • +39 Subjects
I'm a highly creative person who works best with visual thinkers. Very recently graduated from Stanford University, I majored in Human Biology with a concentration in Bioinformatics and Stem Cell Science. Technical though my background may be, I am currently gigging as a singer/songwriter/composer in NYC and tackle even the most hard-science of problems with a top-down, big-picture, holistic approach. If you have a propensity to look at problems in a cross- or inter-disciplinary manner (or want to learn how to do so), I'm the tutor for you!
Zachary
Trigonometry Tutor • +35 Subjects
I am passionate about teaching and tutoring and I thoroughly enjoy helping students gain an understanding and a drive for their studies. I have a long history of working with students of all grade levels and abilities (elementary school through college), and I have a good understanding of strategies to excel in both general academics and standardized tests.
Quinn
Calculus Tutor • +17 Subjects
I am willing to address any issue with an open mind and I try to develop strategies that play to a student's strengths. I would like to think I am very approachable and personable, and I have had very positive experiences with many students in the past using this philosophy. Outside of academics, I love playing basketball and watching sports, as well as chilling with friends, listening to music, and keeping up with politics and current affairs.
Tony
Calculus Tutor • +28 Subjects
I am a recent graduate of Yale University and incoming first year medical student at Columbia University. Originally from the DC area, I have always had a passion for science and medicine and pursued a degree in Biology while at Yale. During the 2008-2009 academic year, I tutored science, math, English, history, and Mandarin Chinese part-time with a DC-based tutoring company. At Yale, I worked as a freshman counselor to provide academic and career advice to incoming freshmen. I have taken both SAT and MCAT test prep classes and am familiar with both tests as well as the preparation necessary to score well. My personal career goals include attending medical school to pursue either immunology/infectious diseases or psych/neurology, teaching biology at the university level, and working in public/global health with either the CDC or the WHO.
Sami
Pre-Algebra Tutor • +19 Subjects
I am a Duke University graduate in Economics and Computer Science. I am currently pursuing an MBA degree at the Yale School of Management. I have worked in the financial field, both at a management consulting firm and a fortune 500 company. My hobbies include playing and coaching soccer. Hobbies: reading, writing, art, books, music
MaryAnn
Calculus Tutor • +21 Subjects
I am a published author who has enjoyed “coaching” our daughter, as she navigated through high school, college and graduate school. I mentor college juniors who are seeking careers in financial services, and I serve as a peer resource to professionals who are transitioning from private industry to the nonprofit sector. Hobbies: reading, cooking, writing, books, music, art, travel
Tiffany
Pre-Algebra Tutor • +56 Subjects
I am available to tutor a broad range of subjects, I am passionate about test preparation, Accountancy, and Algebra.
Samuel
AP Calculus AB Tutor • +29 Subjects
I am a freshman at Caltech majoring in Applied and Computational Mathematics. My favorite subject to tutor is math because I find it very rewarding to simplify complex topics to aid in understanding. I have lots of tutoring experience. In high school, I ran and taught an SAT prep class and was vice president of my school's NHS chapter where I ran our tutoring program, and I, myself, tutored. I also was a teaching assistant in the summer of 2020 for a class in discrete mathematics through a program called PACT (Program in Algorithmic and Combinatorial Thinking). I love learning and hope to make the process enjoyable for you!
Pinelopi
Pre-Algebra Tutor • +25 Subjects
I am a Duke University graduate with a Bachelors degree in Psychology. I have experience tutoring all levels of Spanish language, all sections of the SAT, as well as algebra, pre algebra, geometry, and pre-calculus! I love kids & I have a very flexible schedule and a lot of patience! Let me help you :)
Sharon
Pre-Algebra Tutor • +29 Subjects
I am a graduate of the University of Chicago, and I will be starting a graduate program at Columbia in August. I am about to complete a year of service with City Year, an education non-profit that places young adults into under-served schools. As a City Year member, I worked full-time in the classroom with middle-school students who were in approximately the 10th percentile for math (meaning they score lower than 90% of students). One-fourth of those students were able to grow around 15 percentile points by the end of the year! Hobbies: reading, cooking, gardening, music, art, nature, books, writing
Top 20 Subjects
Frequently Asked Questions
Students most commonly struggle with subject-verb agreement, especially with compound subjects or collective nouns; proper comma usage in complex sentences; and distinguishing between commonly confused words like "its/it's" or "their/there/they're." Beyond mechanics, many students find it difficult to understand how grammar rules connect to sentence clarity and style—they memorize rules without seeing how they improve their writing. A tutor can help you identify which specific areas are holding back your writing and build targeted strategies to master them.
Grammar covers the technical rules of language—subject-verb agreement, punctuation, verb tenses—while style and voice involve word choice, sentence variety, and tone to create impact and personality in your writing. You can have grammatically correct sentences that are boring or unclear; conversely, understanding grammar rules gives you the foundation to break them intentionally for stylistic effect. A grammar tutor helps you master the rules first, then teaches you how to use that knowledge strategically to develop your unique voice and make your writing more engaging.
The key is understanding independent and dependent clauses—knowing when you have a complete thought versus when you need additional information. Common mistakes happen when students either connect independent clauses with a comma alone (comma splice) or break a complete thought into pieces (fragment). Tutoring focuses on teaching you to recognize clause boundaries, then practice combining sentences strategically using conjunctions, semicolons, or subordination. Once you can identify these patterns, you'll catch these errors in your own writing and develop more sophisticated, varied sentence structures.
Rather than just correcting errors, a grammar tutor walks you through why a mistake happened—whether it's a misunderstanding of the rule, careless proofreading, or confusion about a specific concept. They work with your own writing samples to show you patterns in your errors, so you learn to catch similar mistakes across all your work. This personalized feedback on your real essays is far more effective than generic grammar exercises, because you're learning rules in the context of your own voice and writing goals.
Tense shifts usually happen when you're focused on content and lose track of your timeline—especially common in narratives where you slip between past and present, or in essays where you mix past events with present analysis. The fix involves understanding why you chose a tense in the first place: past tense for historical events, present tense for analysis or current facts, and present perfect for events that connect past to present. A tutor helps you develop a proofreading strategy specifically for tense consistency, teaching you to identify your intended timeline first, then scan your draft with that timeline in mind.
Each punctuation mark serves a specific purpose: commas separate items or clauses and add pauses; semicolons join related independent clauses; colons introduce lists or explanations; and dashes create emphasis or insert additional information. Rather than memorizing rigid rules, understanding the *function* of each mark helps you use them correctly. Tutoring teaches you to think about what you're trying to do in a sentence—are you listing items, connecting related ideas, or adding emphasis?—and choose the punctuation that does that job. This approach makes punctuation feel logical rather than arbitrary.
Modifiers are words or phrases that describe other words, but they only work if they're clearly attached to what they're modifying. A misplaced modifier is in the wrong location ("I saw the deer running through the forest with binoculars"—who has the binoculars?), while a dangling modifier has no clear word to modify at all ("Running late, my coffee spilled everywhere"—did the coffee run late?). These errors confuse readers and can accidentally change your meaning. A tutor teaches you to identify what word you're trying to modify, then place the modifier right next to it, plus how to proofread your drafts specifically for these sneaky errors.
If you've mastered basic grammar, tutoring shifts focus to advanced topics like parallel structure for emphasis, subordination to show relationships between ideas, and strategic use of active versus passive voice. You'll learn how professional writers use grammar intentionally—varying sentence length for rhythm, using fragments for effect, or choosing specific verb forms to control tone. This level of grammar work directly improves your essays, arguments, and overall writing sophistication, helping you move from technically correct writing to compelling, nuanced prose.
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