Oh, high school science projects! I'm world famous (seriously) for proposing fusion reactors that high school students could build, and have, winning major prizes.
An Apidictor is fun but you can do a better job with a smart phone app these days than that contraption in the archives. Fun project for a high school science project, as FFT apps are out there either free or for cheap. Supposedly nurse bees produce a slightly higher buzz than mature bees due to their wings being softer. The relative strength of the two frequencies is supposed to predict swarming. There is also a short hiss made when the hive is slapped, the characteristics of which are supposed to predict swarming. Find the article in the archives, but use modern electronics.
Somebody here fed sugar syrup with food coloring in it to bees, changing the color from time to time, and then looked thru the frames and got a stained glass effect. Its a bit less technical than a fusion reactor, but maybe could be turned into a science project. Would at least make a pretty display.
A radar tracking system for individual bees is out of reach of a high school budget, but individual bee tracking of sorts would be possible by marking bees. Put cheap video cameras on, for example, a feeder and a hive entrance and track bee movements. The really cool thing was the recent discovery that bees can do more than navigate from a hive to a food source (per the waggle dance instructions they've gotten), they can navigate from food source to food source, such as an old rich food source that has shut down, to a food source described in a waggle dance. This is trig ... they are plotting the last leg of a triangle, and compensating for the movement of the sun in the process.
Hive instrumentation, such as automated weighing, should be a good job for Arduino microcontrollers, or the other similar brands. Some people here have tinkered with it. These are priced right for high school science projects.
I think I have seen bees figure out how to escape from a slightly open window much faster than a housefly can. Are they smarter, or just have better search instincts?
On the bee decision-making, I've pretty much convinced myself that bees do what they do because they are individuals that really enjoy it, and not some kind of slaves to the hive mind. I think they experience "positive reinforcement" when they do something good for the hive, like finding nectar. The other term used is "reward". Either term we humans equate with pleasure, although behavioral types tend to frown on that term, and we certainly can't know what the bee really feels. But they do something rewarding, and then are more likely to repeat it. My latest suspicion is that they may even be capable of feeling pride. This behavior of individual bees, with some feedback mechanisms (waggle dance, tremble dance, a couple of other "dances", various pheromones, being ignored by the others when what they did was not needed) apparently result in some kind of consensus behavior that creates the hive mind. This is deep stuff, full of possible projects. I'd love a test that can prove that bees experience pride.
Generally, bees are really, really smart for insects, and an IQ test for them would have to be interesting.