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Founder and World-Renowned Tutor


All-Access Membership (Monthly)
Unlimited access to all our SAT® resources, including explanations of 23 real tests and live classes, on a monthly membership plan
48 Course Bundle
$19/month
All-Access Membership (Annual)
Unlimited access to all our SAT® resources, including explanations of 23 real tests and live classes, on an annual membership plan
48 Course Bundle
$99/year
1600.io SAT Math Orange Book Problem Explanations
A complete set of video explanations for every practice problem and SkillDrill™ in the 1600.io SAT Math "Orange Book"
20 Course Bundle
$9/month
Free Bundle: Tests 1-4, Strategy Course, & Tools and Resources
Expert analysis of every question on official SAT practice tests 1, 2*, 3, and 4*, our famous strategy course, and use of our Tools and Resources
6 Course Bundle
FREE
SAT® Strategy Course
Our famous 6-hour course that distills the proven SAT strategies tens of thousands of our students have used to crush the SAT
George George
Tools and Resources
A suite of facilities that support SAT test prep and college apps: autoscoring answer forms, a schedule generator, a reading diagnostic tool, and more
George George
1600.io Live
Live and on-demand viewing of our popular online classes, where we teach math, reading, and writing, discuss test-prep topics, and hold Q&A sessions
George George
SAT® Test 1 Analysis, Answers, and Explanations
12 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 1
George George
SAT® Test 2 Analysis, Answers, and Explanations
11 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 2
George George
SAT® Test 3 Analysis, Answers, and Explanations
Nearly 11 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 3
George George
SAT® Test 4 Analysis, Answers, and Explanations
Over 10 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 4
George George
SAT® Test 5 Analysis, Answers, and Explanations
Over 10 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 5
George George
SAT® Test 6 Analysis, Answers, and Explanations
Over 10 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 6
George George
SAT® Test 7 Analysis, Answers, and Explanations
Nearly 10 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 7
George George
SAT® Test 8 Analysis, Answers, and Explanations
Over 11 hours - that's 154 questions - of in-depth analysis and instruction of College Board® Practice Test 8
George George
SAT® Test 9/Oct. 2017 QAS Analysis, Answers, and Explanations
Over 11 hours - that's 154 questions - of in-depth analysis and instruction of Practice Test 9/Oct. 2017 QAS
George George
SAT® Test 10/Oct. 2018 QAS Analysis, Answers, and Explanations
Nearly 8 hours - that's 154 questions - of in-depth analysis and instruction of Official Practice Test 10/October 2018 QAS
George George
SAT® April US/May Int'l 2017 QAS Analysis, Answers, and Explanations
Over 11 hours - that's 154 questions - of in-depth analysis and instruction of the April 2017 (Maine)/May 2017 international QAS
George George
SAT® May 2017 QAS Analysis, Answers, and Explanations
Over 11 hours - that's 154 questions - of in-depth analysis and instruction of the May 2017 QAS
George George
SAT® March 2018 QAS Analysis, Answers, and Explanations
Nearly 10 hours - that's 154 questions - of in-depth analysis and instruction of the March 2018 QAS
George George
SAT® April US/May Int'l 2018 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the April 2018 QAS
George George
SAT® May 2018 QAS Analysis, Answers, and Explanations
Over 9 hours - that's 154 questions - of in-depth analysis and instruction of the May 2018 QAS
George George
SAT® March 2019 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the March 2019 QAS
George George
SAT® April 2019 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the April 2019 QAS
George George
SAT® May 2019 US QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the May 2019 US QAS
George George
SAT® May 2019 International QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the May 2019 International QAS
George George
SAT® October 2019 US QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the October 2019 US QAS
George George
SAT® March 2020 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the March 2020 QAS SAT®
George George
SAT® October 2020 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the October 2020 QAS SAT®
George George
SAT® March 2021 QAS Analysis, Answers, and Explanations
Detailed analysis of all 154 questions of the reading, writing and language, no calculator, and calculator portions of the March 2021 QAS SAT®
George George
SAT Math Orange Book Problem Explanations: Chapter 1 - Linear Relationships
Video explanations for every practice problem and SkillDrill™ in chapter 1 (Linear Relationships) of the 1600.io SAT Math "Orange Book"
George George
SAT Math Orange Book Problem Explanations: Chapter 2 - Slope-Intercept Form
Video explanations for every practice problem and SkillDrill™ in chapter 2 (Slope-Intercept Form) of the 1600.io SAT Math "Orange Book"
George George
SAT Math Orange Book Problem Explanations: Chapter 3 - Standard Form/Parallel and Perpendicular Lines
Video explanations for every practice problem and SkillDrill™ in chapter 3 (Standard Form/Parallel and Perpendicular Line) of the 1600.io SAT Math "Orange Book"
George George
SAT Math Orange Book Problem Explanations: Chapter 4 - Systems of Linear Equations
Video explanations for every practice problem and SkillDrill™ in chapter 4 (Systems of Linear Equations) of the 1600.io SAT Math "Orange Book"
George George
SAT Math Orange Book Problem Explanations: Chapter 5 - Linear Inequalities & Absolute Value
Video explanations for every practice problem and SkillDrill™ in chapter 5 (Linear Inequalities & Absolute Value) of the 1600.io SAT Math "Orange Book"
George George
SAT Math Orange Book Problem Explanations: Chapter 6 - Exponents and Radicals/Roots
Video explanations for every practice problem and SkillDrill™ in chapter 6 (Exponents and Radicals/Roots) of the 1600.io SAT Math "Orange Book"
George George