Three-Corner Flash Cards: Addition and Subtraction

This is a great resource for teaching addition and subtraction! It not only allows for drilling of the tables up to 12, but introduces and reenforces the understanding of the inter-relationship between addition and subtraction.The student learns, for example, that 2+3 = 5, 3+2=5, and therefore 5-2=3 and 5-3=2 all it one card! In my opinion, this form of teaching is much more effective, helpful, and interesting than simply drilling each addition and subtraction problem separately.The only problem I foresee is that the cards present the answers too easily if one does not cover a corner in time. I think that it will probably best be used in conjunction with traditional flash cards and tables.

Finally, I left off one star because the cards have rough edges; it seems that they are printed on sheets and perforated and are removed from the sheets before packaging. They have perforation "bumps" all along two of the three sides. They would be nicer if they had smooth edges and perhaps were printed on smoother, shiner card-stock such as that used for most decks of regular playing cards.

All in all, and intriguing and useful product.

These cards are really neat, I hadn't seen them before but bought them for my granddaughter who is 2 years behind in school.We'll be using them a lot this summer to hopefully get her a basic idea of how math works.She's easily distracted and frustrated so these cards are nice because working in books and print gets too boring for her.

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an old standby made modern! my 8 year old actually found these on line himself, and enjoys working with them. they are so user friendly that my three year old can help him test himself! we are also going to get the multiplication cards soon!

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My nephew has a terrific time using these flashcards. His teacher was the one who suggested them and we are VERY thankful=)

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These flash cards are wonderful because they show and teach the relationship between addition and subtraction.Using these cards made everything "click" for my daughter.These are the same flash cards that they use in her school, so it helps her to work on the same flash cards.

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