Children have been widely exposed to the "0" in life and have a preliminary understanding of it. But these experiences are scattered and incomplete. In order to let children have a more comprehensive understanding of "0", I designed the math activity "Understanding" for large classes.

According to the "Outline" and the spirit of the new curriculum reform, around the research topic "Research on effective interaction strategies between teachers and students in kindergarten mathematics activities", this teaching activity is very vivid, providing rich and intuitive courseware and objects, aiming at expanding children's horizons, developing children's mathematical thinking, and adopting the teaching method of "active participation, willingness to explore, exchange and cooperation" to promote the effectiveness of children and teachers, peers and materials.