The Hidden Cost of Classroom Interruptions is an accessible write-up of a new study by Matthew A. Kraft. It just appeared in ASCD Educational Leadership.
It points out what we teachers know – classroom interruptions don’t help anybody.
**HALF** of all brief external interruptions we observed led to longer disruptions to learning.
Our observational data suggest some interruptions, and the disruptions they cause, erode learning time more than others.
— Matthew A. Kraft (@MatthewAKraft) June 23, 2020
And if you want even more research back-up attesting to the problem, check out HOW P.A. ANNOUNCEMENTS AFFECT STUDENT LEARNING.