Thomas Nassiff dives into The Wonder Years b-sides over on his blog:

This list is for little more than my own amusement, but I hope that some TWY fan out there takes a look at this and stumbles upon an Actual B-Side or Bonus Track that they never knew existed, and they turn out to love it. The fun thing, too, about Rare Songs, is that they aren’t just for die-hard fans anymore. Back in The Olde Days, you could only find these tracks if you were super-concerned with tracking down every shred of a band’s catalog; the Internet has made it much easier to find this stuff now, to the point where seeing any of these songs played at a Wonder Years show, regardless of when they were released, will usually result in most of the crowd being able to sing along.