板書

1. Origins, structure, and basic meaning

• Structure: 板書 (ばんしょ) means writing on a board or the resulting board notes. The examples use a noun object and a verb.
• Basic usage: A student copies the teacher's board notes; a teacher writes key points while explaining.

2. Common pitfalls and similar expressions

• Board content copied and act of writing key points
  • The first is existing 板書を; the second is action 要点を板書する. Distinguish medium, content, and act.