The backboard is the final part of most science fair projects. If your teacher has given you directions on the preferred layout, then use that — but in the event your are not sure of what goes where, here is a generic backboard template.
Choose 1 to 3 colors to make the display board attractive, but not too busy or distracting. Your title should be EASILY read from a distance of 6 to 10 feet away. Pictures of the process and results will also make the board more attractive and draw viewers to your project.
Here is one example: