1. to teach excessively or beyond what is necessary or appropriate for a student's level or needs
Usage: often used in educational contexts to describe teaching that is too advanced, too detailed, or covers too much material
2. to emphasize or stress a lesson or point too much, reducing its effectiveness
Usage: informal usage; suggests that repetition or over-emphasis diminishes the impact of instruction

Examples

• The teacher worried she might overteach the concept, making it too complicated for fifth graders.
• By overteaching the grammar rules, the instructor actually confused the students more.
• It's easy to overteach when you're passionate about a subject.
• Parents sometimes overteach their children, piling on too much information at once.
• The curriculum was designed to avoid overteaching and instead focus on core competencies.
• She tends to overteach the moral of the story, which makes it less engaging for young readers.