During a recent workshop in Honolulu, I had a teacher ask me, "what is the best way to figure out how long a PBL project is going to take?" The simple answer is the more standards that you designate as "taught and assessed" standards the longer the project. However, the teacher replied that she wanted a more formulaic way to try and figure out how many weeks she would need so that she could calendar more accurately, which got me thinking. When considering how long the project