Develop higher - order thinking skills using graphic organizers common on standardized tests. Includes T - chart on one side for gathering and displaying data and Venn diagram on reverse for comparing and contrasting. Encourages deeper comprehension of any subject as students write with dry - or wet - erase markers, or work with manipulatives. Eco - friendly mats eliminate the need for photocopying and measure 17"L x 11"H each. Grades K - 4.