textbook; CL:本[ben3]
教 · 11 strokes
Depicts teaching a child (子) mathematics or divination (爻) using a rod (攵).
科 · 9 strokes
Phonosemantic compound. 禾 represents the sound and 斗 represents the meaning. Depicts measuring out grain (禾) with a dipper (斗).
书 · 4 strokes
Simplified form of 書. Phonosemantic compound. 聿 represents the meaning and 者 represents the sound. The simplified character 书 is derived from the cursive form of 書.