The Teens Bead Stair Tray (C201) is a organizational and presentation tray designed to hold the teens beads used in early primary math work, supporting children's understanding of the linear counting sequence from 11 through 19. It keeps the bead bars accessible and visually ordered on the shelf, reinforcing the material's self-correcting nature and inviting independent work. Teachers working on bridging concrete quantity with numeric symbol will find this tray essential for maintaining the integrity of the presentation across multiple work cycles.