- Order number: 19992
These CaddyStacks™, with their special inserts, can hold 30 student graphing calculators and one teacher's overhead calculator (the Graphing Calculator CaddyStack™ holds 20 graphing calculators). Numbers are assigned to each student that correspond to the numbers of the inserts, for easy tracking. Includes CaddyStack™, graphing calculator insert and lid. Graphing calculators not included.