Study Guides
Short, practical guides that pair with our tools — the math, the tables, and the edge cases explained properly.
How GCSE Grades Work: The 9–1 System ExplainedWhat the 9–1 scale means, what counts as a pass (4 and 5), and what grades you need for sixth form.How to Grade a Test: Percentage & Letter GradesThe one formula, the A–F scale, and teacher shortcuts for grading any test fast.How to Convert Percentage to GPA (4.0 Scale)The standard conversion table, step-by-step examples, plus/minus vs 10-point systems, and credit-weighted GPA math.What Grade Do I Need on My Final?The exact formula for the score you need on your final exam to hit your target grade, with weighted-grade examples and edge cases.How Many Days Until Christmas 2026?Christmas 2026 is Friday, December 25. Live countdown info plus Halloween, Thanksgiving, and New Year dates.