The Cork Workboard for Geometry Sticks (C318) is a firm, cork-surfaced board that provides the working surface children press geometry sticks into when constructing geometric figures and exploring the properties of plane figures. It is a practical classroom necessity for the Geometry Sticks material, protecting both the sticks and the work surface while giving constructions the stability needed for careful observation and comparison. Replacing worn workboards keeps the geometry sticks lesson fully functional and inviting for continued use.