Characterizing Pedagogical Flow An Investigation of Mathematics and Science Teaching in Six Countries - Schmidt, William H.; Jorde, Doris; Cogan, Leland S.; Barrier, Emilie; Gonzalo, Ignacio; Moser, Urs; Shimizu, Katsuhiko; Sawada, Toshio; Valverde, Gilbert A.; McKnight, Curtis; Prawat, Richard S.; Wiley, David E.; et al. (Springer Netherlands, 2002)