Is it permissible to use the profits from an investment certificate, which the father worked for, to cover higher education expenses?

All investment certificates issued by usurious banks are forbidden (haram), and the profits generated from them are forbidden (haram) and may not be used, including for educational expenses. If the certificates are in your name, you may not benefit from their forbidden proceeds. If they are not in your name, you may not take any expense from them. The forbidden profits must be disposed of by spending them on charitable causes and public welfare. Your father should be encouraged to repent from these usurious dealings.