Study guides
Plain-language guides to grades, tests, studying and math. Free to read, no account needed.
Grades and GPA
How GPA works: weighted and unweightedWhat a GPA is, how letter grades turn into points, how Honors and AP weighting works, and how to work out your own weighted and unweighted GPA step by step.5 min readHCPSS grading, explainedHow Howard County high schools turn quarter grades and the final into the grade on your transcript, plus rounding, A–E letters and Honors and AP weighting.5 min readWhat you need on the finalHow final exam weight works, the formula for the score you need to reach a grade, worked examples, and what to do when the answer is over 100%.4 min read
SAT and AP
How the digital SAT and PSAT workThe digital SAT and PSAT explained: sections, timing, adaptive modules, scoring, the built-in Desmos calculator and what each section actually tests.4 min readAn SAT study planA week-by-week SAT study plan: start with a free Bluebook diagnostic, drill weak skills, take timed practice tests, review mistakes and prepare for test day.5 min readHow AP exam scores workWhat AP scores from 1 to 5 mean, how multiple-choice and free-response parts add up to your score, what colleges do with them, and how to study each part.5 min read
Studying
How to study for a testThe study methods that work best for tests: active recall, spaced practice, practice tests and mixing topics, plus a simple plan for the week before.5 min readHow to make good flashcardsHow to write flashcards that actually help you remember: one idea per card, your own words, both directions, fill-in-the-blank cards and a smart way to review.5 min readHow to plan an essayA step-by-step way to plan an essay before you write: read the prompt, brainstorm, write a thesis that makes a claim and outline body points with evidence.5 min read
Math
Sine and cosine graphs, explainedHow to read amplitude, period, phase shift and midline from y = A sin(B(x − C)) + D, write an equation from a graph and plot one period with five key points.5 min readHow to factor quadraticsFactor any quadratic step by step: take out the GCF, find two numbers for x² + bx + c, use grouping for ax² + bx + c, spot special patterns and solve.5 min readSlope and the equation of a lineFind slope from two points or a graph, write a line in slope-intercept or point-slope form, and handle parallel, perpendicular, horizontal and vertical lines.4 min read
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