After 1, 2, 3, comes 11, 12, 13. Keep your preschoolers and lower elementary students counting up with these counting numbers 11-20 resources. Worksheets use coloring, monkeys, and mazes to keep little learners engaged. You can even lead your students in a song or two to help them master the tricky teens. For more practice counting, head over to our ordering numbers 11-20 resources.