自習

1. Origins, structure, and basic meaning

• Structure: Written 自習 and read じしゅう, it means studying independently without direct instruction at that time.
• Basic usage: It fits solving exercises during a free period or reviewing according to one's plan.

2. Common pitfalls and similar expressions

• Broader moment than full self-teaching
  • It can describe one supervised study period, not only mastering a subject entirely alone.