I collect about 300 research papers on pedagogical content Knowledge(PCK) study. After a simple statistics， the authors' name and the number of his/her published papers are listed as the following.
| Name | Pnum |
| Verloop, N | 34 |
| Krajcik, J | 30 |
| van Driel, J H | 29 |
| Loughran, J | 17 |
| Marx, R W | 10 |
| Soloway, E | 10 |
| Berry, Amanda | 9 |
| Appleton, Ken | 8 |
| Beijaard, D | 8 |
| Veal, W R | 8 |
| Blumenfeld, P C | 7 |
| De Jong, Onno | 7 |
| Henze, Ineke | 7 |
| Akerson, Valarie | 6 |
| Gudmundsdottir, Sigrun | 6 |
| Sternberg, Robert J | 6 |
| Hudson, Peter | 5 |
| Lee, E | 5 |
| Luft, J A | 5 |
| McCaughtry, N | 5 |
| Meijer, P C | 5 |
| Vermunt, J D | 5 |
| Wu, H K | 5 |
| Bulte, AMW | 4 |
| Chen, W Y | 4 |
| Hofstein, A | 4 |
| Roehrig, G H | 4 |
| Rovegno, I | 4 |
| Zanting, A | 4 |
| Abell, Sandra | 3 |
| Adams, Paul | 3 |
| Ahtee, Maija | 3 |
| Baumert, J | 3 |
| Bulger, S M | 3 |
| Davis, E A | 3 |
| Fishman, B | 3 |
| Gess-Newsome, Julie | 3 |
| Grigorenko, Elena L | 3 |
| Housner, L D | 3 |
| Kunter, M | 3 |
| Lederman, Norman G. | 3 |
| Magnusson, Shirley | 3 |
| Mamlok-Naaman, R | 3 |
| McNeill, K L | 3 |
| Mulhall, P | 3 |
| Rivet, A E | 3 |
| Taber, Keith S | 3 |
| Terwel, J | 3 |
| Thompson, Jessica | 3 |
| Traianou, Anna | 3 |
| Weiss, Iris R. | 3 |
| Windschitl, Mark | 3 |
