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The cards used vary widely in size, from the original 1 + 1 ⁄ 2-by-3 + 1 ⁄ 2-inch (3.8 cm × 8.9 cm) Vis-Ed brand flash cards, to half or full index cards, to simply sheets of A7 sized paper. Cards may be created with any marking medium and need not conform to any conventions of size or content unless specified within the scope of the game.
Quizlet was founded in October 2005 by Andrew Sutherland, who at the time was a 15-year old student, [2] and released to the public in January 2007. [3] Quizlet's primary products include digital flash cards, matching games, practice electronic assessments, and live quizzes. In 2017, 1 in 2 high school students used Quizlet. [4]
The oldest known multiplication tables were used by the Babylonians about 4000 years ago. [2] However, they used a base of 60. [2] The oldest known tables using a base of 10 are the Chinese decimal multiplication table on bamboo strips dating to about 305 BC, during China's Warring States period. [2] "Table of Pythagoras" on Napier's bones [3]
3 Yes Yes Yes Video, HTML, LaTeX, Flash ? Yes Yes Yes Yes OpenCards: BSD: Yes Yes 2 Yes Yes Yes PowerPoint slides, Markdown: Yes Yes Via Dropbox: No Yes Pleco: Proprietary: Yes Paid addon Multiple Yes No Yes No Yes Via iCloud (iOS only) No After purchase Quizlet: Proprietary: Yes No 2 Yes Yes Yes Text-to-speech in 18 languages: Yes Yes Yes No ...
In the Leitner system, correctly answered cards are advanced to the next, less frequent box, while incorrectly answered cards return to the first box for more aggressive review and repetition. Spaced repetition is an evidence-based learning technique that is usually performed with flashcards.
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related to: 2 and 3 times table flash cardsetsy.com has been visited by 1M+ users in the past month