The Fiddler's Fakebook is a great collection of many kinds of tunes, including Irish, Scottish, New England, old time, bluegrass, and French Canadian. It's got waltzes, jigs, polkas, marches, reels, and more. I use it with a lot of my beginning students, and I still play a lot of tunes from it myself, as I have for years.

The Internet is also a great source. There are many sites with midis, MP3s, and sheet music available for free. I spend lots of time looking for and finding wonderful tunes there.

I suggest that you tell your teacher that you'd like to learn new tunes by ear and by sight reading. This will give you a lot of options.

Most important of all, have fun!