The Little Professor is a backwards calculator designed for children ages 5 to 9. Instead of providing the answer to a mathematical expression entered by the user, it generates unsolved expressions and prompts the user for the answer

When the user turns the Little Professor on and selects a difficulty level, an incomplete equation such as "3 x 6 =" appears on the LED screen. The user has three chances to enter the correct number. If the answer is incorrect, the screen displays "EEE". After the third wrong answer, the correct answer is displayed. If the answer supplied is correct, the Little Professor goes to the next equation. The Little Professor displays the number of correct first answers after each set of 10 problems. 

This is the early Little Professor with the LED display later ones used a LCD to ask the child one of thousands pre-programmed math questions. 

Instead of the membrane keys introduced few years ago with the Little Professor (1982) in the United States, this one followed the Little Professor (UK) developed in Europe and uses again normal keys. The technology of the keyboard is identical to well known scientific calculator. Compare it with the TI-30.

Manufacturer: TI
Date: 1978

This exhibit has a reference ID of CH49313. Please quote this reference ID in any communication with the Centre for Computing History.

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