Experiment with a variety of different shapes and styles of plane and see which one flies furthest. To make the experiment fair, mark a start point and use the same plane thrower each time. Measure the distance from the start line to a pre-arranged point of the plane, such as the nose tip. Remember to use the same units, such as centimeters, each time you make a recording. Have the same student throw each plane, and instruct him to throw with the same force.
Standardize your research by using one set plane design and size. You can then test different types of paper, such as tracing, corrugated and cardboard-style paper. This experiment works best if the paper you use ranges in thickness and sturdiness. Other differences, such as colors, will not affect the plane (although they should be included in the research as a demonstration.)
Use a range of paper sizes to make your plane to see what difference plane size makes in the flight style and length. For example, your smallest paper plane could be A5 in size and your largest A3. Remember to control your experiment by using the same plane style for each plane.
There are many different methods to make a paper plane, with different folding methods producing contrasting wing shapes and nose lengths. Experiment by making five different styles of plane and testing them against pre-arranged criteria, such as the distance and speed of the flight. Record your results in a matrix and then compare the results to see which plane is best. As well as variations on the standard paper plane model you can experiment with more unique styles such as ring planes, which are cylindrical planes that spin as they fly.
Instead of researching into the best style and size of paper plane, research the best throwing technique. Get others to observe and make a sketch of the different throwing styles used. See which style produces the smoothest and longest flight path.