showboard

Etymology
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Noun

 * 1)  A board used for display purposes.
 * 2) * 2016, African Institute for Mathematical Sciences Schools Enrichment Centre, AIMSSEC Maths Teacher Support Series Mathematical Thinking in the Lower Secondary Classroom (page 112)
 * Write each word on the board. For each, ask the learners to draw it on a showboard, then ask one learner to describe what makes that shape special (or ask a learner to come to main board and draw the shape).