Update teacher form => create class conversion script ranges
Update teacher form => create class conversion script ranges

Looking at 7 day start event and 11 day end event windows, both
starting 11 days back.

codecombat/codecombat,VilkkuV/codecombat,kidaa/codecombat,javatlacati/codecombat,codecombat/codecombat,icodegame/codecombat,icodegame/codecombat,Zerrien/codecombat,jeremiahyan/codecombat,kidaa/codecombat,Zerrien/codecombat,javatlacati/codecombat,probil/codecombat,Zerrien/codecombat,icodegame/codecombat,Zerrien/codecombat,codecombat/codecombat,fabichoi/codecombat,kidaa/codecombat,fabichoi/codecombat,probil/codecombat,VilkkuV/codecombat,javatlacati/codecombat,codecombat/codecombat,VilkkuV/codecombat,jeremiahyan/codecombat,icodegame/codecombat,codecombat/codecombat,javatlacati/codecombat,jeremiahyan/codecombat,fabichoi/codecombat,jeremiahyan/codecombat,fabichoi/codecombat,kidaa/codecombat,probil/codecombat,javatlacati/codecombat,VilkkuV/codecombat,probil/codecombat