The project k.i.d.Z.21-Austria is aimed at raising climate change literacy among teenagers. As the participating teenagers had different weaknesses regarding climate change literacy before the project, the project evaluation places emphasis on how the project manages to compensate for these conditions by focusing on the specific weaknesses. Therefore, the preconditions were detected by means of a pre-survey (N = 392). Based thereon, a t-test for paired samples tested the teenagers' development within the project. The results show that the weaknesses were mostly addressed and that focusing on a target group and weakness specification in evaluating environmental education can be beneficial.