We had lessons in history.
We had lessons in North Dakota geography.
We had lessons in botany and zoology.
We had lessons in astronomy both nights.

We had lessons in music and dance at the Medora Musical.
We had lessons in adaptability.
Our trail crossed the Little Missouri River,
Our trail crossed this muddy stream,
so we crossed (!) this muddy stream.
Unfortunately, we were unable to cross the second stream and had to turn back.
We got tired.
We had fun.
goofing around