Learning Resources 20-Bead Magnetic Demonstration Rekenrek. This display sized Rekenrek for teachers has heavy duty magnets and can be secured to most magnetic surfaces in the classroom. It can also sit on a table or hang on a wall using the attached metal eyelets and included S-hooks. Teachers can use the detachable write-and-wipe panel to write number sentences or hide beads that arent being used. Includes 1 Rekenrek, 2 S-hooks, and 1 write-and-wipe panel. Features multilingual Activity Guide and packaging. 4 Piece Set (Ages 3+)