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Convert between units reliably with dimensional analysis — multiplying by conversion factors so units cancel — including multi-step and rate conversions, for the SAT, ACT, and science.
Understand vectors — magnitude and direction, components, adding and subtracting, and finding magnitude with the Pythagorean theorem — for the ACT and Pre-Calculus.
Understand weighted averages — when some values count more than others — and compute them for grades, mixtures, and group averages, for the SAT, ACT, and SSAT.
Understand acids, bases, and the pH scale — what makes a solution acidic or basic, how the pH scale works, and neutralization reactions — the chemistry background for ACT Science.
Master the ACT Science conflicting viewpoints passage — tracking each scientist's hypothesis, comparing their reasoning, and answering agreement and disagreement questions — with worked examples.
Master the ACT Science data representation passages — reading graphs and tables, finding trends, and answering without outside knowledge — with worked examples.
Sharpen the core ACT Science skill — reading graphs, tables, and figures fast: axes and units, multi-line graphs, combining figures, and trends — with worked examples.
Master ACT Science research summary passages — identifying the hypothesis, variables, and controls across multiple experiments, and comparing their results — with worked examples.
Understand atomic structure — protons, neutrons, and electrons — atomic number and mass, and how the periodic table is organized, the chemistry background that supports ACT Science.
