digital math flash cards to learn sight-memory of addition and subtraction. Tracks speed with graph and compares family members progress - Lenderboy/Math_Flash_Cards ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. From the 1950s, particularly after ...

The 4 basic operations (+, -, ×, ÷) are now supported. The purpose was to provide parents with a flash card game to play with elementary-aged children during COVID ...