All school shows provide a "Teachers Discussion Guide" for class after the assembly. It asks questions about what they saw and more importantly what it represented.
Each assembly provides special Magic Illusion card the school can give to each student. It is an optical illusion that is fun and kids love to keep it with them and show friends and family for a long time. The magical illusion card also has the key points of the assembly so that each time they look at it, they are reminded of the things they learned