An efficient method for memorizing words is the "hand computer": a deck of cards in which word cards are combined with a repetition system on the basis of ever bigger intervals. The hand computer, based on two learning-psychological principles, namely distributed practice and retrieval practice, has various advantages over traditional memorizing with the help of either contextualized or non-contextualized inflexible lists. The system, with which positive results have been obtained in several places, is suitable for all types of learners and for all levels, and is very flexible with respect to content (words, idioms, language functions, pronunciation).The system has also been implemented in a few CALL-programs.
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