LearnExcel teaches Excel by doing, not watching. Each exercise is a small spreadsheet and a task: you type the formula in your browser and it's graded instantly, and any formula that really works is accepted. 280+ exercises from SUM and IF to INDEX/MATCH, SUMIFS, pivot tables and NPV/IRR, 40+ free function guides, and a 7-day plan plus a timed mock test for Excel job-interview tests. Free to start, no signup, in 6 languages.