In 2017, in collaboration with a UC Berkeley researcher, we conducted a quantitative controlled impact assessment study on 127 high school students in the U.S. The students who were taught the scientific methods using our resources showed 40% improvement on a standardized test measuring scientific reasoning, as compared with a control group taught the same content using other science outreach resources. 

See the Executive Summary or read the Full Report linked below to learn all the details of the methodology.