These are a few of the dances the Hermans used to teach at the Maine Folkdance Camp in the 50-70's. They have both died, but their library of music and instructional inserts has been bought and is being reissued by The Kentucky Dance Foundation . Currently they are marketing the Herman tunes on 45rpm records containing four dances, along with an insert teaching, or diagraming out these four dances. They also have some books on all the dances they sell, annotated with the records containing the music, and will do up a custom CD with the specific dances you want at a reasonable price.
The three Kolos are fairly simple line or circle dances, with a repearing pattern of steps. As I recall, the Ersko Kolo has the line starting off with a simple grapevine step, and on the first repetition, the leader does a new step, which the line does the second time around. Except for the very beginning, the leader is one step pattern ahead of the line, as their example for the next step. Alunelil or the Hazelnut, is simple side and grapevine steps to the right or left. The Bavarian Landler is a fun dance, that lends itself to be a demonstration dance. The music is a heavy German 3/4 beat, to which couples do a series of figures while dancing or swinging as couples; Cross Hand Swing, Woman dances forwards turning under man's arm, Man kneels as partner dances around him, Cross hand, leading into a Little Window, as woman turns under their crossed hands twice, leaving the couple looking at each other through a window formed from their arched grasped hands and arms.
As I noted, The Kentucky Dance Foundation will make up custom request CD's for anyone who is interested, but you may want to use the 45 rpm records for one reason only. Many schools still have the old Bogen Educational Record players around the music or dance areas of education. These record players are unique in that they have a turntable with a constantly variable speed. The turntable is driven by two cones connected by an idler wheel, so that the speed can be adjusted from about 10rpm up to about 90rpm. This is valuable when teaching dance steps as you could slow the music down to a crawl, and walk the dancers through the figures a step at a time, and speed the music up when they got better at the figures. Unfortunately most gymn floors have enough bounce in them that the needle skips across the record, with these upbeat songs, so they won't work directly. What you need to do record the music with a cassette or CD burner at various slower speeds, so the cassette or CD, which don't skip can be used with the class, giving them three slow or learning speeds and one set up to tempo to use when they get better at it.
You may find that either UMaine, or UNH still have folk dance groups, frequently in the Women's Rec or Sports department, and there may be some former members near where you teach who can help you start this project off. Of course there's nothing wrong with teaching American Square Dancing, or New England Contra Dancing, dances done in squares of four couples, or lines of six to eight couples, dancing to music handed down from England, Scotland, and Ireland.
Another thought, The New England Folk Festival Association holds an annual Folk Festival at the Natic High School, the end of April, April 21-23, 2006 this year. This festival will bring in a number of vendors of folk material, books and records of songs, instrumental music, and folk dance tunes. This is a great place to see what is available for music and teaching materials.
If you aren't too far north in Maine, one of our better Contra Dance fidlers and callers, Dudley Laufman lives in Canterbury, NH, and frequently can be persuaded to visit a school with his wife who also plays, to lead a teaching/dancing session of Contra Dances. Dudley picked up some of the pieces lying about when we lost Ralph Page, a world famous caller and teacher of of Contra Dances, while Bob MacQuillin continued, writing and playing music for these dances. Today, these two people are world famous for their work promoting Contra Dancing. The University of New Hampshire has an annual Ralph Page Dance Weekend/Festival, I don't have the dates handy but you can get the dates from UNH.
I hope your students really enjoy this effort on your part. I got roped into folk dancing when a friend of mine asked me if I'd be her partner for a 4-H demonstration square dance, as a young man and have never looked back.