ONLY YOUR TEACHER CAN TELL YOU YOUR ACCESS CODE. Once you ask your teacher, he or she will give you a code in the format engrade-xxxxx-11111. If you have a code in any other format - such as 1234 - it is incorrect and will NOT work. If you have a code in the correct format, but Engrade gives you an invalid code message it may be because you entered a typo with your code or because you changed the case of the code (codes are case sensitive).