%0 Journal Article %T Improving instructional competencies through individualized staff development and teacher collaboration in German schools %A Bach, Anabel %A Böhnke, Anja %A Thiel, Felicitas %J International Journal of Educational Management %V 34 %N 8 %P 1289-1302 %@ 0951-354X %D 2020-08-03 %I Emerald Group Publishing Limited %~ DeepDyve