An erasable board cover system is provided to enable the selective covering and concealment of the writing surface of the erasable board. The cover system can include a retractable cover that is adapted to slidably cover the erasable board using edge mounted tracks and reels and cords. In other embodiments the cover is a retrofit item that can be disposed over a erasable board in a stationary, static manner, or can be retractably mounted over the erasable board. A manual knob or an electric motor can control the deployment and/or retraction of the erasable board cover in the retractable embodiment. A locking mechanism is provided and configured to secure and prevent movement of, or the removal of, the cover when in a locked position.