This set corresponds with our Spring Weather 10 Frame Counting Mats (1-10). This set includes 2 designs, 3 frame options (pictures and numbers, pictures without numbers, and no pictures with numbers) number cards 11-20, a subtraction and an addition worksheet for numbers 11-20. If you want to use manipulatives, we suggest using blue puffballs/gems for the raindrops and diamond shaped gems/foam pieces for the kites. Our store also carries a bundle set 1-20 at a discounted price. This math activity aligns with Common Core.