There is a wealth of research on various topics to do with STEM education from various countries.

The State of the Art in Science Education

Explore the results of the M.A.R.CH empirical study. This report presents the results of the MARCH study, focussing on science teaching methodologies and everyday practices in secondary schools. Its objectives were to review the current state of Science Education across Europe and to map the state-of-the-art of students' and teachers' perceptions and opinions of science teaching in the selected countries.

There are more very useful resources, including recommendations to teachers and policy makers as a result of this 3-year project. 

British Council’s Knowledge Centre

Here you'll find International Higher Education reports, research, videos and blogs.