text: Teachers know the course, and they can design the material around the students learning ability. All of this said a teacher designed assignment is the way to go if it is assigned. Both the teacher and students would be greatly rewarded if the teacher designs the project.In Vauban, Germany, there are no cars. The only way to travel aside from walking or bicycling is the tram to downtown Freiburg. If someone has a car, they have to put it in their home or a large garage that costs $40,000 to keep. Vauban is starting the movement to limit car usage, allowing almost none at all, albeit the tram and a few streets on the edge of the community. Vauban is making their city safer because people are free to walk around without the worry that a car will drive by and hit them. The limit of car usage is a great idea because it provides more safety for people and reduces greenhouse gas emissions from tailpipes, which cars are responsible for 12 percent of in Europe, and 50 percent in parts of the United States.