i think a vital part of educating our youth is to engage them. The worst is to have a student who doesn't say anything, doesn't participate, and is often felt left out.
I would break the ice by starting with an introduction to a topic that they could assimilate with, a topic that has a relative association to what you trying to teach them (engineering class talk about how you are working on your own car and what you want to do to fix/build/etc).
Most students, outside of being shy, find it intimidating to participate infront of large groups/classes in fear of being right or wrong, open dialog is what spurs creative thinking so building an environment around collaboration is probably a good approach.
School flunkie, pill junky
But look at the accolades the skills brung me
Full of myself, but still hungry
I bully myself cause I make me do what I put my mind to
And I'm a million leagues above you, ill when I speak in tongues
But it's still tongue in cheek, fuck you