First things first:
Decide on skill/difficulty level of the trail, the ridership. (my guess is the it should be a low skill level )
Walk and flag ( using red plastic tap) the trail as you in-vision it.
Walk the trail again with a experienced trail builder. ( someone from the MMBA ), During this walk make adjustments to the trail layout. Also estimate the length and log any special treatments like bench cuts and/ or bridges. Use this information to form your presentation to the school board. You might ask your language instructor for help with the presentation. Also ask for extra credit.
The presentation should include:
The skill level of the trail and the projected ridership (who you think will ride the trail)
A rough hand drawn trail map with notes showing any special features. (hills, bench cuts, bridges, and easy go a rounds)
An example of the trail marking system you will use. (River Bends trail in Shelby Township has best and lowest cost system)
A public benefit statement. (why this trail will benefit both your school and the general public) A Public benefit statement will be needed
if the trail comes close to private land. Contact MMBA's advocacy director for help if private land is an issue. (do not mention private land unless asked by the board.)
Attack the presentation as the most important part of this project. It will help you get your first job.