Each Curriculum Mastery Flip Chart is mounted on a sturdy easel and features 10 Double-sided, laminated 12" x 18" charts. Side 1 features a colorful, graphic overview of the topic, and side 2 serves as a " write-on/wipe-off" activity chart featuring questions, labeling exercises, vocabulary review & more. Includes activity guide featuring black-line copy-masters & exercises. Set Includes the following 10 charts: Cells - The Building Blocks, Invertebrates, Vertebrates, Animal Growth & Reproduction, Food Chains & Food Webs, Rocks & Minerals, Earth - Inside & Out, Weather & Climate, Force, Motion & Energy, and Electricity & Magnetism. For grade 4.