My teaching career has spanned more than forty years. When I taught arithmetic in elementary school and middle school, I noticed that year after year, students had considerable difficulties trying to grasp specific concepts as they were presented. This led me to create "PASS MATH", in order to make it easier for students to understand these concepts by using manipulatives.
I developed these manipulatives in the classroom in order to make real, abstract ideas. My students found the manipulatives fun to use. Their higher test scores proved that the students learned well.