About The Mailbox and Common Core State Standards and other Standards


Are your materials Common Core aligned?

Yes. We know meeting Common Core State Standards means you need ideas and activities that correlate and support the work you need to accomplish. In our grades K–6 resources, our editors carefully mark ideas, activities, and reproducibles with Common Core labels so you get exactly the resources you need quickly and easily. You can find the applicable Common Core ID in the "Details" section of any content page on our site. Rest assured if your state does not use Common Core, our materials work with any state or national standards.

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