ISIC Card is the International Student Identification Card and can be used outside Estonia as well. See the international ISIC card discounts here. The card may be applied from the Federation of Estonian Student Union project page Minu kool. Some ISIC cards are bank related - these are official student cards and international debit cards at the same time.
ISIC card provides a number of discounts and special offers at shops, cinemas, theatres, various transportation services, sport clubs, etc. in Estonia, ISIC acts as an international card as well.
Lecturers can also apply for the ITIC card (International Teacher Identification Card).