Schroeder, S., Richter, T., McElvany, N., Hachfeld, A., Baumert, J., Schnotz, W., et al. (2011). Teachers' beliefs, instructional behaviors, and students' engagement in learning from texts with instructional pictures. Learning and Instruction, 21(3), 403-415. doi:10.1016/j.learninstruc.2010.06.001.