This set correspsonds with our Christmas 10 frame counting mats (1-10). This set includes 3 different types of mats (pictures with numbers, pictures without numbers, and numbers without pictures), number cards, and worksheets for numbers 11-20. Use miniature candy cane ornaments and gumdrops for extra fun. Our store also carries a bundle set 1-20 at a discounted price. This math activity aligns with Common Core. Happy Holidays and have fun counting!