Wall Murals
This is a great idea for high school students. Any one of the school or classroom walls can be painted for a range of ideas like maps, important people in the history, famous places, or culture of a country.
Read more at Buzzle: http://www.buzzle.com/articles/presentation-ideas-for-school-projects.html
Collages
A collage is created by gluing objects, text, or pictures together. The presentation board to be used for making a collage should look neat and clean. A collage, owing to its pictorial form, proves to be of great help in explaining the project. Moreover, the use of pieces of different colors enhances its appearance.
Read more at Buzzle: http://www.buzzle.com/articles/presentation-ideas-for-school-projects.html