I need to find two chants in triple meter and two chants in unusual meter. I also need to find one song in mixolydian. It is for a Music Methods for Elementary teachers course and I have had a hard time locating these things on the internet and textbooks.

Does anybody know any children's chants in triple or unusual meter? How about a song in mixolydian? I am not picky on what song/chant it is, is long as it is appropriate for children.

Thank you!