Abstract: A stencil case and a plurality of cards are provided for use with the stencil case. The stencil case has a front panel and can receive a card such that the card lies adjacently behind the panel. The panel has a first surface region containing a window through which a user can view the adjacently lying part of a card, a second surface region containing a stencil, and a third surface region bearing indicia associated with what is seen through the window when any one of the plurality of cards is received adjacently behind the panel. Each card has a front face and a reverse face, the front face having a first region containing a picture or indicia that will be visible through the window when the card lies adjacently behind the front panel. Each card further contains a second region for receiving a stencilled marking through the stencil of the front panel. The combination is intended to be used as an educational aid.