Lots of teaching takes place in private and nobody ever finds out about it. Faculty are too busy to reflect much on a scholarship of teaching. Use more conventional terms like teaching research or education research. We need more scholarship of learning. Maybe we would be shocked at how little impact a scholarship of teaching would have.
Teaching is the one thing all disciplines have in common.
If we are not committed to our students how can we expect them to be committed to us. Maybe the TA should implement a Teaching Scholars Network. People would be more comfortable undertaking this scholarship in collaboration with others who know how to present such research. The TA should help establish learning specialists within the disciplines.