24.
Gess-Newsome, J., Carlson, J., Berry, A. K., Borowski, A., Fischer, H. E., Radboud, I. H., Kirschner, S., et al. (2013). A report on the PCK Summit: Current and future research directions. Symposium at the annual meeting of the National Association for Research in Science Teaching, Puerto Rico, April 8, 2013.