5.0Exceptional(17 reviews)
Offers online services
Offers online services


800score (a free site similar to Khan Academy), has helped millions of students prepare for the SAT, GMAT, GRE, and LSAT since 1999. 800score GMAT and GRE simulation software has been licensed to test prep companies and universities, worldwide. The new digital SAT resembles the GRE and GMAT.

I studied neurobiology at Cornell, English at Oxford, and at Cornell Law. I scored a 99.98 percentile on the SAT. The median SAT score of my 250+ in-person students is 1480 (on par with Johns Hopkins and Cornell) with a score increase of +150 on Verbal.

I've been to ETS and GMAC headquarters (where the SAT/GRE and GMAT are designed, respectively) and have consulted with their psychometricians. I worked with Ron Purewal (who holds the world record for most perfect scores on standardized tests) and a former Chairman of the College Board. Kaplan wanted to hire me for their R&D department, and McGraw Hill offered me a publishing deal.

The SAT is used by admissions officers because it strongly correlates with undergraduate GPA. This suggests that ramping up college readiness will “ping” the SAT’s sophisticated psychometrics, resulting in a higher score with the added benefit of improved college performance. Simply put: If the SAT wants to measure college readiness, why not give the test what it wants?

To prep students for SAT verbal, I teach a crash course in college-level reasoning: economics, literature, philosophy, science, and logic. 800score has been simplifying complex intellectual concepts for 24 years. SAT prep done properly should help you get into your ideal school and succeed once there.


7 employees
24 years in business
Serves Philadelphia , PA
Offers online services

Payment methods

Cash, Check, Venmo, Paypal, Zelle, Bitcoin


Grade level

Middle school, High school, College / graduate school, Adult learner


Reading, Essay writing, Creative writing, Grammar

Photos and videos

  • Reviews

    0 reviews

    claudia K.

    Sean is the best teacher I’ve ever had. I wanted to go up from my prior score of 1520 and he raised it to a 1570.
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    September 29, 2023

    jiya C.

    Sean is a skilled SAT tutor. He has a comprehensive knowledge and understanding of the material, and can explain it in ways that make it easier to comprehend. I’m so thankful for his help - he was instrumental in helping me score higher on the test.
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    September 12, 2023

    dylan H.

    I loved all the ways you made things easy and simplified. Thank you for teaching me performance strategies. I promise to keep better sleep schedules and manage my circadian rythyms!
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    August 29, 2023

    taylor W.

    Sean mixes up a variety of strategies from Bruce Lee’s Taoism to neurobiology to Richard Feynman. I learned so much and was able to raise by score by 390 points.
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    August 27, 2023

    lily D.

    Thank you for your “pet policy”, “pet theory”, “galaxy brain”, “robot lawyer”, taoisim and all your other brilliant insights that helped me kill the SAT.
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    August 26, 2023

    smriti D.

    I had the pleasure of working with Sean as my SAT tutor. He was patient, knowledgeable, and always willing to go the extra mile to help me understand difficult concepts. His teaching style is engaging and he has a knack for breaking down complex topics into easy-to-understand chunks. I highly recommend him as an SAT tutor - hes the best!
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    August 23, 2023

    Services offered

    Reading And Writing Tutoring
    Test Prep Tutoring