There are several points to be prepared for the last open class of primary school mathematics:

Prepare lessons, such as: what are you going to teach in this class or what are the key points that students need to remember;

Prepare some questions to ask in class;

The content needs to be simple and easy to understand, so that the whole class can understand and remember as much as possible;

Doing some classroom interaction can make students think about whether we have encountered such math problems in real life;

Be sure to have a loud and passionate voice when giving lectures, so that students will be infected by your passion when attending classes.