How to write the design concept of blackboard writing?

The design concept of blackboard writing can be written as follows:

1. Make it clear whether the design of blackboard writing is to help students better understand the course content or to show the key points and difficulties of the course.

2, concise and clear, the blackboard should be concise and clear, to avoid redundancy and complexity of the text.

3. Highlight the key points and put the most important information in the most conspicuous position, so that students can see it at a glance.