Group Code
You should have been given a "Group Code" to log in with. If you don't know it, search for it here.

Password
Your initial password is your Student ID immediately followed by your last name (first letter capitalized). For example, if David Jones had a Student ID of 54321, he would enter "54321Jones" as his password. If you don't know your Student ID, talk to the director/instructor who owns the account.