Voices in Our Room Chart Author:Scholastic Hang to visually demonstrate number and operations skills, or lay flat for kinesthetic center activities. Use with a wet-erase marker to highlight numbers!\n\n# Shows numbers -25 to 25 horizontally on one side and vertically on the reverse to prepare students for the orientation of Cartesian coordinates in algebra and geometry\n\n# Reinforces po... more »sitive and negative numbers, operations and algebraic equations\n\n# Includes 2 magnetic arrows, 2 inflatable vinyl number cubes (5" each) and 10 double-sided, reproducible Activity Cards with answer key\n\n# Thick vinyl number line with hanging grommets measures 48"L x 8"H; use with wet-erase marker to highlight numbers\n\n# Grades 4+« less