When it comes to those basic maths facts, there's nothing like practise, practise, practise. But making them interesting is quite another matter. Here's an irresistible activity you can use with your second grader to send messages in “secret code.” Next time you pack a school lunch, for example, try putting in a special note with your love and good wishes … in a code that your child and her friends can decipher over their meal.
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