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Math
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Start from what the formula means, one step at a time
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English
Eikame
Talk, fix, and make it stick
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Science
Rikame
Think about "why?" like an experiment
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History and social studies
Rekikame
Understand events as connected stories
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Computer science and programming
Kodokame
Learn how it works by running it
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Past exams
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E
Eiken quiz
Learn English vocabulary and grammar
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K
Kanken quiz
Practice reading and writing kanji
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M
Suken quiz
Arithmetic and math, grades 10 to 1
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S
Science proficiency quiz
Grades 5 to 1: physics, chemistry, biology, and earth science
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WH
World Heritage quiz
Grades 4 to master level
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L
Logical reasoning
Sequences, sets, reasoning, and probability
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Rank tests
CT
Crane-and-turtle problems
Try a rank test
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WR
Work-rate problems
Solve work-rate problems
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TX
Tax calculations
From consumption tax to bookkeeping
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