From the Curriculum Matters post on the Fordham NGSS report, a response from Carl Wieman:
But Carl Wieman, a professor of physics at the University of British Columbia, rejects the notion in the Fordham analysis that practices crowd out content.
“In its repeated criticism that the NGSS are abandoning knowledge in the pursuit of practice, the Fordham reviewers are holding up a false dichotomy, suggesting there is competition between knowledge and practice in the standards,” said Wieman in an emailed statement. “In fact, in its emphasis on the integration of practice and content, the NGSS is calling for knowledge to be learned deeply and usefully, the way scientists learn and use that knowledge.”
Mr. Wieman, an American physicist who won the Nobel Prize in physics 2001, served on the team that reviewed the final National Research Council framework, a document that guided the development of the Next Generation Science Standards.
He said, “The Fordham analysis fails to recognize that the NGSS [performance expectations] can only be satisfied with deep and substantial content knowledge, a much deeper knowledge … than science education research is showing most students are now achieving even after completing university courses in chemistry and physics.”