FOUNDATION → CHALLENGE
Ratios, Rates, Proportions & Units
Rates, proportional relationships, ratios, unit conversions and scaling.
SAT PRACTICE • PROBLEM SOLVING & DATA ANALYSIS
Problem Solving & Data Analysis
Rates, percentages, probability, descriptive statistics, inference and data displays. Each topic set moves from foundation to challenge and is designed for independent practice before answer review.
Open practice PDF →
FOUNDATION → CHALLENGE
Percentages & Percent Change
Percent change, successive changes, discounts, markup and reverse-percent reasoning.
FOUNDATION → CHALLENGE
Probability & Conditional Probability
Simple probability, tables, complements and conditional probability.
FOUNDATION → CHALLENGE
Measures of Center, Spread & Data Sets
Mean, median, range, standard deviation and effects of changing data.
FOUNDATION → CHALLENGE
Sampling, Inference & Experimental Design
Random sampling, margin of error, generalization, assignment and causal conclusions.
FOUNDATION → CHALLENGE
Data Displays, Scatterplots & Modeling
Graphs, scatterplots, residuals, line of best fit and model interpretation.
CONTENT PRINCIPLE
Practice should make the test feel easier, not merely familiar.
Work the question before looking for the answer.
The library is designed around topic recognition, method choice and mistake diagnosis rather than memorizing a fixed set of templates.