Abstract: An educational audio visual clock having an image window adjacent each numeral on the clock face to show the images of twelve Presidents of the United States at any given time. Images are on an image plate behind the clock face and display the images of the first twelve presidents from midnight until noon wherein the image plate is rotated to reveal the images of the second twelve Presidents of the United States for the next twelve hours, at which point the image wheel returns to its original position. At the top of each hour an LED illuminates the corresponding presidential image and an audio device plays an audio clip related to that president.

Abstract: An educational game to reinforce the rules of etiquette is described. A marker is passed between players when a player catches another player in a violation of the announced rules of etiquette. The player having the marker at the end of the game is subject to a sanction. Alternatively, the player having the marker at the end of the game is entitled to a reward.

Abstract: An educational toy clock which has a base with a plurality of spaced apart recesses about the outer periphery thereof reflecting the number positions of a clock face. The base further includes a central recess. A rotatable mounting unit is provided for receipt in the central recess of the base. A pair of clock hands are adapted to be removably mounted in the mounting unit for rotation therewith. A plurality of disc members which cooperate with the bottoms of the recesses are provided, the disc members each having a color and number from 1 to 12. A plurality of dowel members are provided for receipt in the recesses, the dowel members having first and second ends.

Abstract: A digital clock display and a math display are disposed on a surface of a math teaching unit. A processing unit is configured to display time including an hour and a minute on the digital clock display based on control signals from a clock circuit and a clock setting apparatus. The processing unit is configured to display math equations on the math display such that a first operand equals the hour and a second operand equals the minute.

Abstract: An electronic timing device has a transparent liquid crystal display for use on an overhead projector, for projecting a large image of the LCD numerals on a screen or wall of a classroom, for timing of tests or other activities. The timer has a plastic casing, various function keys, a solar cell and/or battery, other internal electronics and a transparent liquid crystal display. Foldable legs of the timer, when open, maintain the timer a set distance above the light stage of the projector so as to prevent the LCD from overheating. One of the foldable legs, in the closed position, serves as protection and as a reflective backing for the LCD, so that the timer can function as a desk top LCD clock in the closed position. The timing device can function as a clock or timer in various modes.