Abstract: A method and apparatus for a computer-based teaching system includes modifying a text file by inserting a first predetermined character at a first end of a first selected information element, and also inserting a second predetermined character at a second end of the first selected information element. A blank box is created in an area defined by the first and second predetermined character. The blank box replaces the first selected information element. Data is stored in a memory, with the data representing the first selected information element. A user interface is provided, which enables selective display of either the blank box or the first selected information element.

Abstract: An educational device adapted to use interchangeable card members having comparable informational indicia thereon is provided comprising a casing having interchangeable dielectric panel members having upper and lower surfaces removably secured to the casing. A plurality of pairs of normally open electric current paths are associated with the lower surface of the panel member, each of the current paths having a pair of normally open magnetic switches thereby forming a corresponding pair of magnetic switches. A source of electrical energy is connected to the open electric current paths operative when activated to provide a sensurous indication when a corresponding pair of normally open switches is closed.

Abstract: An educational teaching toy for teaching a child the names of various objects. The toy comprises a card holder for holding a card having a visible picture of an object, and adjacent thereto aligned spaced-apart letters defining the name of the object. A slider covers the name, and if the child does not know the name of the object, the slider can be moved in increments across the name from one end thereof to the other to expose the letters one at a time to assist the child to identify the object. A double sided laminated card having letters that are visible only when the card is back-lit is also described.