Your students must be so lucky! I can only dream of a teacher composing stuff for us :3
The song reflects a pretty careless state of mind, going on with life as if nothing mattered, just moving on, day after day, and keep going forever! It sure brightened up my day! :)
The reason I didn't give it a perfect score is because, even though it is a loop, I wish it was longer! I would really have liked an extra minute or two.
The arrangement is pretty seamless, it loops properly, and it stays cohesive throughout, even after the little surprise! Nothing feels out of place or context. It just works.
I also liked how the drums were mixed with the rest, present but not overwhelming, and how you managed to keep the guitar upfront instead of it being muffled by the rest with that extra brightness on the high ends.
Overall, everything flows really well to make a really cohesive song structure that brings new elements along the way, and even though it is a bit short to my liking, it's pretty awesome. Thank you, thank you! :)