The “Ed-Tech Top 40” analysis is based on real-time online activity from over 300 schools and districts during the school year. It was generated from more than 2 billion data points using a plug-in on Google’s Chrome browser that identifies what’s being used in schools.
https://marketbrief.edweek.org/marketplace-k-12/whats-trending-new-ed-tech-top-40-digital-tools/