1. Adams, R.S.: Observational Studies of Teacher Role. In: Flanders, N./Nuthall, G. (Eds.): The Classroom Behavior of Teachers. Internationale Zeitschrift für Erziehungswissenschaft, Bd. XVIII (1972), Vol. 4, pp. 440–459
2. Adams, G.L./Engelmann, S.: Research on Direct Instruction: 25 years beyond distar. Seattle 1996
3. Aebli, H.: Grundformen des Lehrens. Stuttgart 1976
4. Anderson, C.W./Roth, K.J.: Teaching for meaningful and self-regulated learning in science. In: Brophy, J. (Ed.). Advances in Research on Teaching. Bd. 1, Greenwich 1989, pp. 265–306
5. Anderson, L.W./Ryan, D./Shaprio, B.J.: The IEA Classroom Environment Study. Oxford 1989