You might want to consider enrolling in the STEM Certificate Program. This is a joint project between the Christa McAuliffe Center at Framingham State University and the PTC engineering software company. As a graduate of this program, you get access to all of the curricula developed by other graduates. I just uploaded my Lego Robotics course to the repository last night. I am hoping that they will eventually open it up to the general public. If you want access to my curriculum, you can access it here. Above is an image from that class. This is not a photograph. This is a student-created 3-D image of the student’s robot.