Simple translucent plastic circles like the lids of coffee cans or margerine contains provide more than adequate single radius arcs and circles. Opaque lids should not be used because it's necessary to see through the plastic to align the circumference with a given point as its center. Color markers work best, though crayon pencils will do. Elmer's glue or a clear liquid glue with a sponte-tip dispenser works well for most projects described in these pages. In some cases, heavier weight drawing papers or tagboard are best for polyhedron constructions that are to be cut and folded.
Colors show best on better quality papers.
Sets of Photocopied Worksheets Keep on hand a set for a whole class, plus half as many again to accommodate students who need an extra sheet or two. Especially at the outset, some projects require two or more sheets per student.