The Teacher’s Edition contains 160 lessons divided into 22 chapters. The colorful Student Worktext pages with answer overprint are included for each lesson. Each chapter is preceded by a Chapter Overview, which explains the chapter theme and contains notes about materials that need to be gathered and prepared for the lessons. A bulletin board is pictured and explained. Some chapters include A Little Extra Help section which provides ideas for helping the student who is experiencing difficulty with the concepts taught in the chapter. Each chapter concludes with a Chapter Review and a Cumulative Review lesson. The Teacher's Toolkit CD is located in the inside back cover. It contains 1–2–3 WRITE pages to provide additional number writing practice. The CD also includes the reproducible pages from the Appendix. The Teacher's Visual Packet is available on the CD for use by home educators and those teaching small groups.