All of the OpenSciEd units are being designed as Open Educational Resources (OER) that are licensed as CC-BY-4.0. This license does require appropriate attribution, which means you must give appropriate credit provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the OpenSciEd endorses you or your use.

OpenSciEd believes that by providing these units freely to all users, including commercial vendors, we will increase the number of teachers and students who have access to high-quality science instructional materials. Educators should feel empowered to use, modify, and reuse all of these resources. We encourage you to share broadly and openly any changes and innovations you make to these resources so others can reflect on and take advantage of your best thinking.