I believe as a Physics instructor my duty is to challenge and support the students. In Community College I teach 200 level general Physics lab and seminar. The big picture for the courses is to learn basic Physics concepts. I know that learning is a development process, so students might need to face challenge and feel a little down when they cannot solve the questions at the first time, but I just need to give them a little push, and soon they will develop their own way to work most effectively.
In the beginning of each lab, I have brief introduction about what we are going to do in the lab, and I will also give students the goal what we are going to approach in the lab. The most important idea for students to learn in the general Physics lab is to have experimental verification of different principles or laws. The goal is to insuring that student know the foundational concepts from the hands-on experience. In other words, learning by doing and also to see is to believe can give students an easy way to understand difficult ideas and concepts.