Will Hay was a big deal in the UK in the 1930s. In 1937, when he made Good Morning, Boys, British film exhibitors voted him the 4th-best box office draw. His signature character was a jocular schoolmaster, and in this movie he brings his pupils to Paris where they outwit a gang of crooks.
I had never heard of this movie or Will Hay before I began compiling this list. Even Leonard Maltin failed to mention most Hay movies, including this one. Finding gold like this and sharing it with you is, for me, the best part of compiling the Internet Archive Top 100.