- How to join the Ultimate Scratch Music Collaboration (Google Classroom): 1). Go to the "Google Classroom" website. 2). Click the "+" button in the top-right corner of your screen. 3). Click "Join Class". 4). Enter this code: {Currently Being Reset} 5). Request and receive your assigned part, along with the parts before it. Wait your turn! 6). Create your part based off of the previous ones! 7). Name the song with the next incremental number added to the end like this: “Title - (Part #)”. 8). Send it back to pass on the song!