Math by Myself--Missing #'s by 5's & 10's

We have a new choice activity in our Math by Myself choice during Daily 5 Math. This choice gives students extra practice both with skip counting by 5's and 10's, as well as writing numbers above 20. Our standard in kindergarten is to be able to write numbers up to 20, but this activity allows for students to stretch beyond the standard. On laminated pieces of paper, the students have a full hundreds chart complete with missing numbers in both the 5's column and on the other side the 10's column. Students go through skip counting and fill in the missing number using a dry erase marker.