Bildnachweis

© iStockphoto.com / kzenon / Teacher motivating students in schoolclass
© iStockphoto.com / Neustockimages / two teen students using a laptop
© iStockphoto.com / Neustockimages / teenagers giving the thumbs up isolated

#93901583 group of happy students showing thumbs up @ Syda Productions - Fotolia.com
#26751682 funny assistant @ benik.at - Fotolia.com
#103850732 group of students and teacher with laptop @ Syda Productions  - Fotolia.com