Condensed from a comment in another LJ
I went to Catholic school only till middle of the third grade. Then we moved to Wilmette, Illinois and our parents decided to put us in public school on the announced rationale that we wouldn't be meeting only Catholics for the rest of our lives. In latter years I've wondered whether it was rather an economic decision. Anyway, I have no recollection of my Catholic school years, except that I wrote to my best friend in Detroit that "instead of Religion we have Recess", which appealed to my aesthetics because they both begin with R.
I do remember being disoriented when nuns' habit styles changed so their bangs were exposed.