This download contains several activities to use for teaching the concept of missing numbers in Kindergarten. I love to use the number cards to teach numbers 1 - 20 during the month of December. The students love to play games with the cards and they enjoy hunting for Santa's present! The 5 worksheet/assessment activities are great to use as quick assessments after teaching missing number in your classroom! I hope these are helpful and that your students enjoy the fun Santa activities as well!