An educational timepiece provided with the hour hand and the minute hand, which comprises a base plate having an upper surface on which the hour hand and the minute hand rotate, and an angle hand rotating on the upper surface of the base plate for measuring the angle between the hour hand and the minute hand, wherein the angle hand serves to measure the angle between the hour hand and one of the hour indication parts adjacent to the hour hand, the interval between every two adjacent hour indication parts being divided by a given angle.

An educational timepiece provided with the hour hand and the minute hand, which comprises a base plate having an upper surface on which the hour hand and the minute hand rotate, and an angle hand rotating on the upper surface of the base plate for measuring the angle between the hour hand and the minute hand, wherein the angle hand serves to measure the angle between the hour hand and one of the hour indication parts adjacent to the hour hand, the interval between every two adjacent hour indication parts being divided by a given angle.

An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

An adjustable timer teaches time in a simple manner to those having difficulty understanding the concept of time. The timer displays remaining and elapsed time. The timer may be set to rotate a shaft at different speeds. A colored disk is attached to the shaft. Boards having faces with different numerical indicia reside in a cavity and may be interchanged by a user. The exposed board face corresponds to the setting of the timer such that one full rotation of the shaft and disk corresponds to the numerical indicia of the exposed board face.

An educational clock that includes a base, a minute number line chain including a plurality of minute links pivotably connected together, and an hour number line chain including a plurality of hour links pivotably connected together. The minute number line chain is adjustable between an annular shape configured to removably couple to the base and a linear shape. The hour number line chain is adjustable between an annular shape configured to removably couple to the base concentrically with the minute number line chain and a linear shape. The minute number line chain and the hour number line chain are approximately the same length when each is in its linear shape.

An educational clock that includes a base, a minute number line chain including a plurality of minute links pivotably connected together, and an hour number line chain including a plurality of hour links pivotably connected together. The minute number line chain is adjustable between an annular shape configured to removably couple to the base and a linear shape. The hour number line chain is adjustable between an annular shape configured to removably couple to the base concentrically with the minute number line chain and a linear shape. The minute number line chain and the hour number line chain are approximately the same length when each is in its linear shape.

An educational clock that includes a base, a minute number line chain including a plurality of minute links pivotably connected together, and an hour number line chain including a plurality of hour links pivotably connected together. The minute number line chain is adjustable between an annular shape configured to removably couple to the base and a linear shape. The hour number line chain is adjustable between an annular shape configured to removably couple to the base concentrically with the minute number line chain and a linear shape. The minute number line chain and the hour number line chain are approximately the same length when each is in its linear shape.