After you have completed your Internet research, decide what type of roller coaster model you want to build.

Design the model, list the materials needed, then collect the materials and build your roller coaster track.

What material are you going to use to simulate the roller coaster track? It should be flexible enough so that you can include loops in your design.

What item are you going to use for the roller coaster itself?

Make sure that the item has enough mass to build up speed as it goes down the track. Remember, a model doesn't always work exactly the same way as the real thing, so don't be discouraged if your design has some flaws. Also, you probably will not need to include the initial hill where the roller coaster is pulled up in your design. Assume that the coaster is already at the top of the first hill.

Do not include any kind of motor in your design. When the track is finished, test your design by placing the coaster at the top of the first hill and letting go. Remember, do not add any energy to the roller coaster by pushing it along the track.

Did your coaster come out at the end of the track? If not, adjust the track and try again.

When you have completed your trials, prepare a short report. In the report, draw the final design and write a paragraph describing your reasons for your design choice and how it worked when tested.