GPA & Grade Calculator
Weighted 4.0-scale GPA with a target simulator — free and private
Related guides
118 Elements, Filterable by Block, Category and Temperature
How the periodic table tool previews phase changes at any temperature, why elements shift color by block and category, and what the comparison mode is for.
The SuperMemo SM-2 Algorithm, Implemented in the Browser
How a 1-5 self-rating turns into an ease factor and a review interval under the SM-2 spaced-repetition algorithm, and why the schedule accelerates for cards you know well.
Pacing a Multi-Section Exam in Seconds Per Question
Why 'minutes left' isn't the pacing number that matters on a sectioned exam, and how seconds-per-question turns a time budget into a decision rule for each question.
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