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Your starting point for certifications, quizzes, and rank tests.

Certifications and quizzes

Study English vocabulary and grammar from grade 5 to grade 1 through quizzes

Practice reading and writing kanji from grade 10 to grade 1

Practice elementary and secondary math with four-choice quizzes

Science proficiency quiz

Grades 5 to 1; from grade 2, choose physics, chemistry, biology, or earth science

World Heritage quiz

Learn about UNESCO World Heritage sites from grade 4 to master level

Rank tests

Crane-and-turtle problems, summarizing, speed reading, typing, and more; advance from grade 10 through dan ranks with AI grading