This Winter Addition & Subtraction resource helps Grade 1 students build confidence with facts within 20 using visual models, ten-frames, number lines, picture models, missing number tasks, and quick checks. Each page includes fun winter and New Year–themed images to keep students engaged during January mid-year review. Skills Included: Addition: ( 10 worksheets ) ✔ Addition within 20 ✔ Picture addition ✔ Missing addends ✔ Make 20 ✔ Winter ten-frame addition ✔ True or False equations ✔ Co