This mega pack of 100 quick image cards are great for students who are still working on making sense of the landmark number 10. Every combination from 1+1=2 through 10+10=20 are included! The images are displayed using the structure of a ten frame (which is a bit more concrete than just random dots which are essential a little later for extending number sense). Each card presents two ten frames with a different amount of dots. The goal is for students to make sense of each double ten frame quantity either by shifting enough dots from one ten frame to fill the other (thus making 10 + whatever is left which will help greatly later on when they learn place value concepts), or to identify how many are missing in all and subtract that amount from 20. It may sound tricky, but once students begin practicing these on a regular basis, they will become much more fluent with their addition facts to 20. So throw away those old flashcards and timed tests! Use these cards to develop fluency with addition facts to 20!