ClarosFree skill guides
SAT & ACT skill guides
A plain-English guide to every skill the digital SAT and the ACT test. For each one you’ll find what it actually tests, the mistakes that quietly cost points, and the habits that move your score — all free, no account needed.
SAT Reading and Writing
11 skillsInformation and IdeasCentral Ideas and DetailsRead the guideInformation and IdeasCommand of Evidence — TextualRead the guideInformation and IdeasCommand of Evidence — QuantitativeRead the guideInformation and IdeasInferencesRead the guideCraft and StructureWords in ContextRead the guideCraft and StructureText Structure and PurposeRead the guideCraft and StructureCross-Text ConnectionsRead the guideExpression of IdeasRhetorical SynthesisRead the guideExpression of IdeasTransitionsRead the guideStandard English ConventionsSentence Boundaries and PunctuationRead the guideStandard English ConventionsForm, Structure, and SenseRead the guide
SAT Math
12 skillsAlgebraLinear Equations and SystemsRead the guideAlgebraLinear Functions and InequalitiesRead the guideAdvanced MathEquivalent ExpressionsRead the guideAdvanced MathQuadratics and Nonlinear FunctionsRead the guideProblem-Solving and Data AnalysisRatios, Rates, and ProportionsRead the guideProblem-Solving and Data AnalysisPercentagesRead the guideProblem-Solving and Data AnalysisStatistics and Data AnalysisRead the guideProblem-Solving and Data AnalysisProbabilityRead the guideGeometry and TrigonometryArea and VolumeRead the guideGeometry and TrigonometryLines, Angles, and TrianglesRead the guideGeometry and TrigonometryRight Triangles and TrigonometryRead the guideGeometry and TrigonometryCirclesRead the guide
ACT English
3 skillsACT Math
3 skillsACT Reading
3 skillsACT Science
3 skillsPractice these skills with Claros
Reading about a skill is step one. Claros builds adaptive practice around the exact topics you’re weakest on, so every question you see is the one that moves your score the most.