Lizelle found CK-12 Foundation:

• Significantly improves attainment“Test scores improve”
• Significantly builds student knowledge“Better understanding of concepts”
• Significantly improves teaching efficiency and productivity“Good demos and exercises”
• Significantly reduces teacher workload“Having good demos like CK12 available online, reduces stress and research time for teachers”
• Moderately saves school money“I can’t really speak to that as I have only been able to use free resources from ck12”