A file should be maintained on each student including emergency data, test records, contracts, etc. Some might argue that this is unnecessary work, but the file takes little time, keeps information organized, and may be extremely useful for a number of reasons, such as when student was last promoted, any medical conditions, or disciplinary problems.
Long-Distance Telephone Call Record
This record is useful when the phone company makes mistakes on billing, or when you need to track unauthorized calls by employees.
All testing records should be maintained forever. Years from now, previous students may need you to verify their rank. You took their money for the testing, so you should be able verify their performance and their results at every testing in which they ever participated.