The required supplies needed for next year varies depends on the classes and teachers. Teachers share their supply needs for specific classes on their syllabus at the beginning of the year. Therefore, there are no mandatory supplies to bring at orientation or the first day of school. Teachers, generally, are in need of facial tissues, dry erase markers, hand sanitizer and cleaning wipes in their classrooms so you are requested to purchase these items in advance.
A generic supply list is here Supply List Link