For most of the last 100 years of K-12 schools in the United States, more attention has been given to cognitive and academic improvements rather than social emotional learning. Schools have more leeway in constructing curriculum around curriculum content of English and history, math and science rather than the feelings of students.
A recent Report by Fordham University revealed that most parents want schools to teach social emotional learning to their children. The importance of this survey finding is that schools have a very important role to play in the instructional learning of social emotional learning.
Fordham Survey Findings
Research Support for SEL
The Learning Policy Institute has recently commented on this survey of SEL support by parents:
Schools Are Already Doing Social Emotional Learning
There is broad support in schools for this as well because teachers notice the difference in learning when students are able to concentrate, when they feel good about themselves, and when something in their social emotional learning is being attended to by teachers.