I just found this website late last night while exploring Pro-Teacher and I am so excited! I think it's pretty obvious how passionate I am about problem-solving, and I have tried for years to find a good resource for problems. How have I not seen this website before?
The website does an excellent job of describing math problem-solving and shows really clear examples of journal pages. It has really excellent free-resources like games, literature connections, and math center ideas.
In addition, they offer e-books full of journal prompts. The problems are really good--they allow for multiple strategies and multiple answers, just like Larry Buschman describes in Share and Compare (my favorite book on the subject). The books are $6 and each contain 50 problems already laid out to print on standard mailing labels. The problems cover multiple math strands including counting, geometry, patterns and sorting. I bought the Kindergarten and 1st grade problems, and they were worth every penny.
I promise you that I am in no way connected to this website--I just found it for the first time. But I am so excited about it that I had to tell you about it right away! So, if you've been looking for problems or want to know a little more about kindergarten problem-solving, this website is a great place to start!