Open Up Resources 4.0
ASSISTments contains many problems from Open Up Resources, licensed under the Creative Commons Attribution 4.0 (CC BY 4.0). That means anyone is free to use them, for any reason, as long as they give attribution to the authors and post the details of the licenses.
All Creative Commons licenses require that the people who redistribute such content need to do 4 things: 1) give attribution on who the authors are/where it came from, 2) publish a link to the exact Creative Commons license that it came from, so others will know the license to cite, 3) to state if we know if the material is copyrighted, and finally 4) provide a disclaimer that the original authors do not endorse WPI's use (or our changes).
First, for attribution, this material comes from a group called Open Up Resources. This statement constitutes our attribution responsibility.
You can visit the Creative Commons website to view the license deed and the full legal code for Creative Commons Attribution 4.0 (CC BY 4.0).
We thank Open Up Resources for deciding to give away their resources! They also send us XML files to make our job easier, so thanks, Open Up Resources.
You can read the backstory reported in the media here about how Open Up Resources paid Illustrative Mathematics (TM) to author the 6-8th grade curriculum.
The licenses also require us to make the disclaimer that our attribution of credit to Open Up Resources does not constitute their endorsement. All errors on our website are WPI's fault, and Open Up Resources is in no way responsible. For instance, we have tried our best to put the same material into ASSISTments, but errors happen. To give an example, we had a copy-paste error the other day where we copied the "1/2" symbol, but it pasted as "12". We have corrected the errors when we have been informed about them.
Open Up Resources and Illustrative Mathematics are registered trademarks owned by their respective organizations.