I am in the final year of my Engineering degree but still find greeting my teachers difficult.
It happens whenever I am on my way to college, when I have to walk from the Hostel to Campus, which takes around 15 minutes. Usually the teacher and I will be walking on the same path. I always notice people around me, so I will give them a glance. Sometimes, they look and sometimes they don't. I try to say good morning but many teachers won't reply back, this makes me feel awkward. I feel like my voice is not audible in some situations (my friends usually say such things when teachers won't respond me). This has caused me to not greet them unless the teacher speak themselves many times.
What is the etiquette for greeting teachers when crossing their path on the campus?
I would appreciate your valuable suggestions.