How effective are Mandarin flashcards?

Tien Hsia Language School uses flashcards in their curriculum as well, so it does work to a certain extent. I would think it works the same as English flashcards. Flash cards are an effective learning tool. http://ideas.time.com/2013/01/09/highlighting-is-a-waste-of-time-the-best-and-worst-learning-techniques/

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thanks