the difference between theoretical and experimental probability?What do you think is the deciding factor in how and when they understand it?Is it the hands on experiments or the charts that help students to understand?I recently read an article about advancing students and the harmful effects it can have if done too early.If students aren't developmentally ready for a concept, then it can be difficult for them.Some things take time and we are pushing a lot of students ahead.What do you think about this?