gistfile1.js

_.each(subjects, function(subject){
  //find all teachers that teach this subject that have available blocks
  //if this subject has preferred times / days, check if any teacher has those
  //blocks / days open, and if so assign by setting available to false on both the 
  //special teacher and class schedule, and adding class / teacher / subject taking up that 
  //slot
  //if preferred block isn't available, put this class wherever there's room
  //if no blocks are available, add this subject to a list that will display
  //outside of the schedule as an error
  
})