To address this issue, I estimate the impact of later start times using only data from students who experience a change in start time while remaining in the same school. (educationnext.org)
They appreciated being able to use not only their data tables and graphs, but also their images as visual evidence to support their ideas. (citejournal.org)
Previous reports have focused only on resistance, and included only data from public sources. (newscientist.com)