Teachers' difficulties during problem-solving instruction

Alexander Karp has written an article that was published online in Journal of Mathematics Teacher Education on Saturday. The article is called Analyzing and attempting to overcome prospective teachers’ difficulties during problem-solving instruction. Here is the abstract of Karp's article:
This article analyzes the experiences of prospective secondary mathematics teachers during a teaching methods course, offered prior to their student teaching, but involving actual teaching and reflexive analysis of this teaching. The study focuses on the pedagogical difficulties that arose during their teaching, in which prospective teachers lacked pedagogical content knowledge and skills. It also analyzes the experience of the course itself, which was aimed at scaffolding the work of prospective teachers on developing their pedagogical content knowledge and skills.