5.0Exceptional(18 reviews)
Offers online services
Offers online services


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

I studied neurobiology at Cornell and English at Oxford. I scored a 99.98 percentile, cumulative, on the SAT, and 99th percentiles on the GMAT, GRE, and LSAT. The median SAT score of my 250+ in-person students is 1480.

I've been to ETS and GMAC headquarters (where the SAT/GRE and GMAT are designed, respectively) and have consulted with their psychometricians. Kaplan wanted to hire me for their R&D department, and McGraw Hill offered me a publishing deal. I have taught the new Digital SAT and have years of experience with computerized testing.

I offer a 250 point score increase/or over 1450 guarantee.

I only accept serious students:

> a commitment of at least 100 hours of intensive self-study.

> coachable and willing to accept feedback to self-improve.

The SAT is used by admissions officers because it strongly correlates with undergraduate GPA. Ramping up college readiness will “ping” the SAT’s sophisticated psychometrics, resulting in a higher score with the added benefit of improved college performance. SAT prep should help you get into your ideal school and succeed once there.


Hired 6 times
7 employees
25 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

  • 2) how to fix test prep
  • 3) SATs are better indicators than HS GPS
  • 4) SATs predict drop out rate
  •  5) embrace intellectual challenges
  •  5) embrace intellectual challenges

  • Reviews

    0 reviews


    nupoor R.

    Over four months my daughter’s score jumped from 1170 to 1430. He worked tirelessly and diligently. Thank you Sean.
    ... Show more
    January 16, 2024


    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.
    ... Show more
    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!
    ... Show more
    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.
    ... Show more
    August 26, 2023

    Services offered

    Test Prep Tutoring