Useful links for those who are interested in SEL:
As a starting point visit CASEL's webpage - it has lots of resources about SEL programmes and their effectiveness
Transforming Education is a - recently set up - American organisation focusing on developing SEL competences in students
Mindset Scholars Network includes senior american scholars and up-and-coming researchers from across the social sciences (economics, psychology, sociology, and statistics). They examine the mindsets that students need to be motivated to learn.
Edutopia has a dedicated page for SEL
ENSEC (The European Network for Social and Emotional Competence) regulary organises conferences inviting researches and practitioners interested/working in SEL in Europe
Here you can look at the agenda of ENSEC's latest conference (organised at the summer of 2015)
And you can also see some short introductory videos on SEL here: