Update Stephen's OH
Update Stephen's OH


Former-commit-id: 437d903fb534717eee8a8e5c4108936961130438
Former-commit-id: 2fda3bee06eefec13012166116b5151e749075e5
Former-commit-id: 85f49356aaecf2c2c0e59ff82b8da331c5a47622
StanfordHCI/cs247,StanfordHCI/cs247,StanfordHCI/cs247