Porcelain steel Magnetic Chalkboards be it a Green Chalkboard or a Black Chalkboard offer superior color contrast, vastly improving visibility. Classroom Chalkboards should be of good quality, since it is being used much of the School day. They have to be with a good Writing Surface and have a easy Erase-able Surface. If more Board space is needed, or for different subjects, you may consider the Horizontal Slide Boards. Select the Board that serves your needs best. Chalkboards are available in many sizes, they can also be custom sized. Factory framed Chalkboard in anodized aluminum or wood trim.