Let students work in groups

• Take into account that most girls prefer interaction and cooperative learning over competition.
• Try to make groups with more than one female student (so girls can support each other in a group).
  
• Some teachers advised us to try making groups for experiments and practicals consisting out of only girls (so they dare to try).
• Consider assigning roles for practical work (so boys are not always in the lead).
  

[1] Burke, R. J. (2007). Women and minorities in STEM: A primer.