PERFORATED GRAPH CHARTSPerforated Charts — Rub a chalk-dust filled eraser over these Durable Charts and leave the pattern on the chalkboard …Filling the entire board with the desired pattern enables a number of students to do board work at the same time. Charts measure 36´´ x 42´´, attached to sturdy spring rollers, on durable backboard equipped with chain hangers to allow chart to be easily pushed against board. These PERFORATED CHARTS work equally well on WHITE MARKER BOARDS (use BLUE TALC-DUST) or on TRADITIONAL GREEN or BLACK CHALKBOARDS (use WHITE TALC-DUST). | ||||||||||||||||||||||||||
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