Addition Fact Fluency and Compensation HUGE first grade math centers and activities unit - this fun and differentiated JAM-PACKED unit is filled with over 250 pages of everything you need to teach addition fact fluency and making tens to help add easier. This pack covers 4 main standards/concepts: fact fluency, adding 10, adding 9 (moving 1 over to make a 10), and making a ten to add (making 10 to add strategy).See REAL PICTURES of this unit in action! Check out these blog posts full of pictures