Evaluating the usage of ed-tech products is tricky, complicated, and oftentimes confusing. But it can be done.

Consider the case of the Granite County school district in Utah. It partnered with a company called LearnPlatform to measure whether time spent on three particular pieces of software led to a bump in student achievement.

The district found that one program had great results for English-language learners and Native American students. Another seemed to get results when students used it as often as the manufacturer suggested, but going beyond that didn’t lead to better outcomes. A third was barely used at all, and the district is considering nixing it.

Full story at Education Week