expertise group
1 = pre-service teachers
2 = trainee teachers
3 = in-service teachers

Sex of participants
1 = female
2 = male

Further training for technology-enhanced teaching
1 = No
2 = Yes

Own a Tablet (privat)
1 = Tablet

Use of technologies for teaching in last half of a year
1 = never
2 = in 1-2 lessons
3 = in 3-5 lessons
4 = more than 5 lessons

video player tool
0 = not used
1 = used in lesson plan