While Southern California may never experience snowy weather, we’re certainly entertained in the fun and musical ways school principals let parents and children know that school is closed. It has become a trend to sing about school closure and record it for the YouTube world to enjoy.   They almost makes us wishes that we had snow days too. Well, not really. Enjoy!   “ School Is Closed ” Principal Matt Glendinning of the Quaker Moses Brown School in Providence, Rhode Island d