por Shulman, Lee S [autor] | Keislar, Evan R.
por Hattie, John [autor] | Clarke, Shirley [autor] | Sánchez Ibáñez, Miguel [traductor] | Hattie, John. Visible learning.
por Morine, Harold, 1927- [autor] | Morine-dershimer, Greta [autor] | Belmonte Martinez, Cecilia [traductor] | Morine, Harold, 1927-. Discovery.
por Hargreaves, David J. (David John), 1948- [editor].