Slate Math 2 of 2Slate Math 1 of 2 Ms. Barrett’s fourth grade class is one of the classes that is piloting a Promethean Slate…a clipboard sized interactive board. As the student works with the virtual tablet, her actions appear on the projected screen for the class to see. On this interactive “flipchart” page, the students write their guess for solving the math problem on the white circle, and then use the virtual eraser to erase their guess and the white circle to find out if they are right.