Reading
main idea, author’s purpose, factual and inferential comprehension, evaluation, vocabulary in context
OpenTACHS Questions of the Day
One TACHS question a day, with a full explanation.
Updated October 3, 2026
365 daily questions, mixed across topics and difficulty. None repeats until you have seen them all.
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Getting the most from it
- Answer before you open the explanation.
- Say why the right answer is right.
- If you miss it, review the linked lesson and try a similar question.
Written Expression
passage organization, sentence revision, clarity and effective expression, standard English, line-error identification
OpenMathematics
number sense and operations, algebraic patterns, data analysis, probability and statistics, geometry, measurement
OpenAbility
figure matrices, paper folding, figure classification
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