Simply cut paper in half and laminate, once laminated, punch a hole on the top of each problem and use a binder ring to enable easy flip. I recommend using Crayola washable markers and baby wipes for cleaning or water and paper.
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Cut and laminate each domino
Cut and laminate corresponding number quantity 1-20 Single numbers
Use velcro and apply to empty slot on domino card and on single numbers
Have child count the dots and find the corresponding number. Great as