Sara Turner found CK-12 Foundation:

• Moderately improves attainment“Full access online to updated content.”
• Moderately builds student knowledge“I love the explore more option. I'm not sure if my students are actually using it, but it's there for them.”
• Moderately improves teaching efficiency and productivity“CK12 is integrated into Canvas which has helped tremendously with grading efficiency.”
• Moderately reduces teacher workload“Again, full integration into Canvas has helped to reduce teacher workload with grading.”
• Significantly saves school money“Free program means more funding for other avenues. However, our textbooks were so extremely outdated that I'm not sure any money has been spent in that direction for a long time.”