A pack of chalk is cheap and your kids will love jumping while practicing math facts.

一盒粉笔很便宜而你的孩子们会爱上这种边玩边学的方式。

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"Daddy," Isabelle said to me after reading for some time, "let's do some math facts before we land."

伊莎贝拉看了会儿书说“爸爸，在着陆前，让我们在练会数学题吧。”

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"Daddy," Isabelle said to me after reading for some time, "let's do some math facts before we land."

伊莎贝拉看了会儿书说“爸爸，在着陆前，让我们在练会数学题吧。”

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