Also this paper, which was part of Aina Appova's dissertation:
Appova, A., & Arbaugh, F. (2018). Teachers’ motivation to learn: implications for supporting professional growth. Professional Development in Education, 44(1), 5-21.
This is difficult because teachers are supposed to love teaching. if not, they will demotivate students. As a consequence, students will be just looking for grades without motivation to learn.
Article Quantifying the Effects of an Active Learning Strategy on th...