A better project would likely be the Death Box.
The WO is a 2 woofer enclosure. There are other plans for single drivers that involve more "Horn" styles.
Try:
http://www.speakerplans.comor
http://melhuish.org/audio/horninfo.htmlThere are lots of single driver horn type subwoofers out there that might make a good school project, but cutting the Wo in half is probably not the easiest or best way to get results.
I imagine it can be done, but the theory you are attempting to bring to the science project is like as not easily explained.
Let us know which way you decide to go.
Might I add that the DB will allow you a great deal of flexibility with the accompanying paper. It will allow you to show how changing the chamber size can adjust the tuning and the sound of the enclosure. That might be more fun to show in a school project too, or maybe even a small housewrecker for similar reasons.
Take care,
Robert