Funding for this research was provided by:
Business Finland (1801/31/2105)
Finnish Ministry of Education and Culture (OKM/62/626/2016)
Received: 17 June 2020
Accepted: 8 September 2020
First Online: 22 September 2020
Ethics approval and consent to participate
: The study followed the principles of the Declaration of Helsinki and was approved by the research ethics committee of the University of Jyväskylä (ref no. 2017/12/13). Written informed consent was obtained from participating teachers, students, and students’ parents prior to the commencement of the trial. All participants were informed that they were allowed to withdraw from the study at any time without prejudice, and have their data deleted. During the study, all travel and activities of research staff and participating teachers were covered by accident insurance.
: Not applicable.
: The authors declare that they have no competing interests.