Khan Academy
Free, world-class education for anyone, anywhere.
Duolingo teaches languages through short, game-like lessons with streaks and leaderboards, and has expanded into math, music and chess.
A few minutes a day.
Streaks, leagues and rewards.
Dozens of courses.
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Free, world-class education for anyone, anywhere.
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Core features with usage limits.
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Plans and prices change often — check the official website for current pricing.
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