What whiteboard surface is best for math or science instruction?

For math and science instruction, a porcelain steel whiteboard is recommended — it provides a high-contrast, bright-white surface that shows pencil-thin formula lines clearly, is highly resistant to ghosting, and accepts magnetic document holders. Large sizes (6' x 4' or larger) and multi-panel configurations allow extensive equation work. OfficeFurniture2go.com carries educational whiteboards — call 1-800-460-0858.