You will need to register with Universal Class before participating in their classes.
After clicking on this link, you will be prompted to enter your ID or library Barcode. If you have not yet registered, you will not have an ID. Your library barcode needs to start with 4575 as the prefix followed by the number you use when checking out materials. This will make your barcode number be anywhere between 5-8 digits. For example: if your library card number is 2015, you will need to enter 45752015.