In the high school setting, we have so many class offerings that compiling a supply list is difficult.  Therefore, we recommend students have a notebook(s) to accommodate four subjects per semester and writing utensils.  Any items beyond that are student preference- personal hand sanitizer, hi-liters, tissues, etc.  There may be specific classes with special needs- calculator for math, drafting paper for architecture- but those needs are unique to the class being taken.  A backpack or duffel bag is also very handy, especially if students are taking a PE or Strength & Conditioning class that may require certain types of apparel.