It’s a kind of thing you don’t really know about unless you played them on a regular basis, but until now, Iowa Mennonite School hasn’t had a team name. It’s been around since 1945, but the second reference was simply “IMS”.
But now, the school has a new name, Hillcrest Academy, and a nickname, the Ravens. (Autoplay video only: KCRG) As far as I am aware, this is only the third private school in Iowa to have “Academy” in its name, following Morningstar Academy and Ankeny Christian Academy. Those are very different in character from both Clarinda Academy and Woodward Academy, which are, uh, not religious schools.
As referenced in passing before, the school is typically billed as in Kalona but is about 5 miles northwest of the IA 1/22 intersection, and may be why the village of Joetown is on the state highway map.