Students must register online to compete at CUSF. The hard copy registration forms are used as entry paperwork into the pre-qualifying district science fairs and contain all of the appropriate signatures and project documentation required to compete at CUSF. The online registration allows you to be entered quickly into the CUSF database. The CUSF database is used to create judging cards, organize the winner lists, create certificates, etc. Please note that you will compete in the category you pick in your online registration (if it differs from the category you specify in your paperwork).