Abstract: A learning aid permitting the student to insert a worksheet into a rigid body having space between two planes. One of the planes is clear permitting the instructor to mark on it, performing the work required by the underlying worksheet. The instructor's marking is erased and the student attempts the same task. The work sheet is secured in place by a clipboard. The clipboard rides in a slot to prevent scratching of the clear panel member. The clipboard may be secured in the slot by a latch mechanism.

Abstract: A learning aid permitting the student to insert a worksheet into a rigid body having space between two planes. One of the plaens is clear permitting the instructor to mark on it, performing the work demanded by the underlying worksheet. The instructor's marking is erased and the student attempts the same task. The work sheet is secured in place either by (i) its natural mechanical tension with the two planes, or (ii) by an insert mechanism securing the paper either through electrical attraction or by a mechanical clip.