Steve,...I believe the developer recommended by Freestyle for that film is just that,...a recommendation...probably to get the best quality and least grain out of the film. I've not tried that film because I use Rodinal as a developer (and sometimes coffee) and although Rodinal would work, its generally perceived as not the best developer for small grain.
If you plan to use the darkroom at the school for this film you may find it much more convenient just to use whatever developer they have there. Indeed, you may find it awkward to try using a different developer. I think I'd check with the teacher before doing that.
If you want to do developing at home, I don't know of a simpler developer than Rodinal. It's cheap, its easy to mix, it's "one-shot" (meaning you discard the diluted developer after one use), it lasts forever on the shelf, and it goes a long long way (especially if using highly dilute mixtures, such as 1+100). Plus Freestyle sells it, so you can order a bottle with whatever film you decide on. (Its sold as R09.)
By the way, here are the developing times for the Silvermax films in Rodinal.
B&W Film Developing Times | The Massive Dev Chart
One more thing,...if I were you I'd go to Flickr and check out the images people have posted that have been taken with the Silvermax film. I'd also look to see if there are any examples of Silvermax film images developed in a developer other than the one recommended by Freestyle. (I've nothing against that developer, I'm just thinking about ease of use for you, in case you are obliged to use the developer that the school's darkroom is equipped with.)