8,100 lessons across 9 levels
Primary Year 1 (Pre-K, Ages 3-4)
Primary Year 2 (Pre-K+, Ages 4-5)
Primary Year 3 (K, Ages 5-6)
Lower El Year 1 (1st, Ages 6-7)
Lower El Year 2 (2nd, Ages 7-8)
Lower El Year 3 (3rd, Ages 8-9)
Upper El Year 1 (4th, Ages 9-10)
Upper El Year 2 (5th, Ages 10-11)
Upper El Year 3 (6th, Ages 11-12)