ByrdNick, 
Do students learn better if instructors share slides?
An experiment gave students no access, partial access, or full access to instructor’s slides. Access didn’t significantly help.
When controlling for other factors, “bringing slides to class negatively impacted …exam performance” in two of three units (R < -.2). It never helped.
And “using slides to study” never helped (above and beyond other factors).
https://doi.org/10.1016/j.compedu.2015.02.002
