An Iowa school district knows how to send the summer away with a song.

They may not be Broadway's next Jean Valjean, Cosette or Fantine, but during a districtwide welcome back to school meeting, a group of teachers, who seem to have a creative spark, joined a flash mob to perform a new, and possibly improved, version of "One Day More," WHO reported.

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With lyrics like "Do we know the common core?" and "We will teach what they don't know," the staff should be ready for the 2015-2016 school year.