(By The Super Simple Learning Resource Center)
Here you have some useful tricks and games to use flashcards in classroom.
One example is this game I didn’t know:
Guess The Picture
Take two sheets of paper the same size as the picture cards. Cut several small holes randomly spaced in one sheet. In the second sheet, cut larger holes in the same spots, so that the holes from both sheets of paper line up. Cover a flashcard with the large-holed sheet, and then place the small-holed sheet on top of that. When you look at the picture, you will only be able to see small parts where the holes are. Can you guess what the picture is? No? Slowly remove the large-holed sheet, revealing the picture bit-by-bit.
Here you have the link to the whole article: