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Strategy, data, and advice to help you navigate the SAT, ACT, and college admissions.

ACT Math Flashcards: 57 Free Formula Cards You Need to Know

The ACT gives you no formula sheet. Every formula you need — from the quadratic formula to the Law of Cosines — has to be in your head before you sit down. That's a problem for a lot of students,…

Should You Take the ACT Science Section? What Major Colleges Actually Require

By Brian Stewart, Barron’s SAT, ACT & PSAT Author & Perfect SAT/ACT Scorer The ACT Science section is now optional — and at most colleges, you are free to skip it. But a handful of schools do require it in…

AP® Calculus AB Study Guide: How to Study for AP® Calculus AB (What the Exam Actually Tests)

By Brian Stewart, Barron’s SAT, ACT & PSAT Author & Perfect SAT/ACT Scorer Most students who struggle on the AP® Calculus AB exam don’t struggle because they skipped content. They struggle because they prepared for a different test than the…

AP Precalculus Study Guide: Unit-by-Unit Plan with Free Practice Drills

A unit-by-unit AP Precalculus study guide covering all three tested units, the four free-response task types, and the three mathematical practices — with links to all 30 free practice drills organized by topic.

How to Study for the ACT: A Complete Guide

Most ACT study guides underestimate the test — especially its time pressure. This guide, built on how experienced tutors actually prepare students, walks you through every step: diagnosing your weaknesses, prioritizing your three core sections, deciding whether to add optional Science, managing pacing, and building the real skills the ACT rewards.

SAT Math: The 10 Most Tested Topics

After 20+ years of SAT tutoring, I've watched students waste months preparing the wrong topics. This guide breaks down the 10 most frequently tested SAT Math topics, explains what each one actually requires, and links to free practice drills — plus a score-range prioritization framework so you know exactly where to start.

PSAT vs. SAT: What’s the Difference and Does the PSAT Matter?

The PSAT and SAT test the same skills, use the same digital adaptive format, and are the same length — but they serve very different purposes. In this guide, a 20-year SAT/PSAT tutor and Barron's author breaks down the key differences, explains how the National Merit Scholarship Program works, and tells you exactly when PSAT prep is worth your time.

AP Biology Study Plan: Unit-by-Unit Guide with Free Practice Drills

Most students who struggle on AP® Biology don't have a content problem — they have a study method problem. This post gives you a unit-by-unit study plan built around the six science practices the exam actually rewards, with free practice drills for every unit.

How to Study for AP® World History: Modern: A Unit-by-Unit Study Plan

By Brian Stewart, Barron’s SAT, ACT & PSAT Author & Perfect SAT/ACT Scorer Most students who struggle on AP® World History: Modern don’t struggle because they didn’t read the textbook. They struggle because they studied the wrong way — memorizing…

How to Study for AP® English Language and Composition: A Six-Week Study Plan

Most students who struggle with AP English Language and Composition aren't struggling because they can't write. They're struggling because they're writing the wrong things — summarizing when they should be arguing, listing evidence when they should be connecting it, and…