Number facts presented in a race track! Each A4 page has 4 Race Tracks with 20 number facts each. The PDF has bookmarks to guide you to the different types of number facts: Add on 1; Add on 2; Add on 3; Mix of Add ons; Zero facts; Doubles facts; Doubles+1 facts; Partners to 10 facts; Build to 10 facts; and, Add 10 facts. Each type of number facts has 125 A4 pages! Thus, 14x125 pages = 1750 pages! More than enough! I have used this with great success in the classroom and with my own kids.