A- A A+
 
A- A A+

Mobbing and mathematics achievement in TIMSS 2015 ...

„Internationally, with respect to mathematics achievement in TIMSS 2015, students who reported they were bullied about weekly achieved 36 points (or nearly one grade level) below those students that were almost never bullied.“

IEA (Hrsg.), „How systemic is international bullying and what relationship does it have with mathematics achievement in 4th grade?“ (April 2018), S. 4