Padlet is very useful. We can use padlet to let students brainstorm around a problem, theme and project. Students can see other people’s ideas on the padlet wall and add their own ideas. After brainstorming, teachers can further analyze and explain the contents on the wall.Students’ ideas often surprise teachers! Therefore, in the process of brainstorming, teachers should guide students to launch more ideas as much as possible, emphasizing that this is a “brainstorming moment”, and they are not afraid to do what they want. In the choice of topics, teachers should try to choose more open topics, so that students can have space to play.