よしゅう予習yoshuu
1.
The process of studying or practicing material ahead of time in order to be better equipped for upcoming lessons or classes.
2.
Engaging in preliminary learning to enhance understanding and retention before formally covering new topics in an educational setting.
3.
The act of reviewing content that has not yet been taught, aimed at facilitating smoother comprehension during future instruction.
Example:
トムは明日の授業の予習をしているらしい。