Evolutionary theory constitutes the overarching concept in biology. There is hardly any other concept that is more complex, and causes more difficulties in learning and teaching. One instructional approach in optimizing the learning of complex topics is to use worked examples combined with self-explanation prompts that fit to the prior knowledge…

During the last 10 years, outreach science laboratories have become increasingly popular due to resource and time limitations in schools. Outreach laboratories offer hands-on projects in a situated and authentic learning setting, thereby promoting the development of students' scientific literacy. However, students' cognitive achievement within…

This study investigates the effectiveness of political science classes in Germany. It analyzes whether or not 1,071 students in the 9th and 10th grade showed increases in knowledge after participating in the lesson series. This analysis focuses on the competence dimension "subject-specific content knowledge" as well as on the…

Besides cognitive learning effects, short-term environmental education (EE) is often regarded as ineffective in intervening with participants' environmental attitudes and behaviour. However, in Germany, school classes often participate in such 1-day EE programmes because they better match the school curriculum in contrast to longer (residential)…

Clean drinking water, our most important resource, needs comprehensive protection. Due to its ubiquitous availability, the awareness of the importance of clean drinking water has partially vanished. Therefore, sensitizing within this context and improving individual ecological behavior has become an important issue in science curricula. We…

Although informal learning environments have been studied extensively, ours is one of the first studies to quantitatively assess the impact of learning in botanical gardens on students' cognitive achievement. We observed a group of 10th graders participating in a one-day educational intervention on climate change implemented in a botanical garden.…

A hands-on instructional approach with medium-achieving 10th-grade students (N = 294) successfully demonstrated the achievement of a conceptual change. Two teaching variations were applied (I-1, I-2), both dealing with a hands-on gene technology lesson in an out-of-school laboratory. I-2 additionally confronted the participants with alternative…