This Addition to 20 fun and differentiated JAM-PACKED unit is filled with 142 pages of everything you need to teach adding to 20. This pack covers 5 main standards/concepts: addition within 20, number lines (counting forward), word problems, adding doubles, and doubles plus one (near doubles). From differentiated worksheets to super fun first grade math centers and games, it has everything you need for addition within 20!Get this in the First Grade Math Units 1-9 BUNDLE to save a ton! **Please c