Mel Bay Publishing's Jerry Silverman materials are great. Tape and songbook.

Another good series readily available in toy stores, and some bookstores, is Wee Sing. Some titles are folk, and don't be fooled by the baby packaging. Also includes chords, easy to play on guitar or (teachers' fave?) autoharp, plus tape.

Beyond that, it depends on the sub-genre you might be interested in.

Of course our own Digital Tradition database will have lyrics to zillions of things. Printable and reproducible. If you get some good recordings from your library, you should be able to find many of the songs here in the DT.

Let us know how it goes!!!!

~S~