A two-year-long study of Khan Academy's effect on K-12 students' math skills suggests the online lessons may help boost performance and confidence, even if the materials play only a supplemental role.
The study, funded by the Bill & Melinda Gates Foundation and developed by SRI International, involved 2,000 students in grades 5 through 10 between 2011 and 2013. The students were scattered across nine different schools, all of which used the materials from Khan Academy to varying degrees. At the end of the study, 85 percent of teachers said they thought Khan Academy had a positive impact on students' learning. Among students, 71 percent said they liked the Khan Academy lessons, while 32 percent said they liked math more as a result of using the materials.
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