The "Horizons" math curriculum from Alpha Omega is a spiral math curriculum that helps students master concepts through an introduction, review, and reinforcement. Brightly illustrated, engaging workbooks will help move students quickly through progressively difficult concepts in a colorful, motivating, context. This is Horizons Math 4 Book 1, which is the first of two student books used in this curriculum (the other is not included and is sold-separately). Horizons Math Grade 4 Book 1 includes 80 lessons that cover addition, greater/less than, even and odd numbers, rounding numbers, addition with carrying, estimation, and more. 256 pages, softcover; consumable workbook.