A good place to start is to reverse it; how would you like your classmates to approach you about your worst trauma?
If it were me? I wouldn’t people approaching me about my trauma. I might seek individuals out, but I would neither like to be sought out, nor to have others decide how I “should” be. So I would show others (peers/ classmates) the same respect/politeness I would want; by keeping as much distance as possible between what I have with me that terrifies them, not blocking their access to the exits, not attempting to force the issue, etc.. If they want to work on their fear? That’s for them to decide when, how, and with whom. Not my responsibility to force the issue. They’re adults. They can make their own decisions.
((For MY students, IE kids not peers… the most important thing I could do is let them switch classes / make sure they know they have that option, help them through the process, and assure it’s done by the administration without punitive measures attached to the poor kid. No one should be forced to attempt to get an education whilst their rapist stares them down in class day after day, ya know? Nor suffer serious health conditions for no durn reason. (Allergies). Beyond making sure that people who are powerless -assigned classes/teachers- aren’t being brutalized by terror day in and out, or afflicted by misery-making to life threatening allergies…not only the whole quarter/year wasted for them academically, but with untold effects rippling across their lives? There are a whooooooole lot of service dog ambassador type programs that acclimate children & make it a non-issue. Voila; Allergies & Serious mental health conditions attended to, & the rest acclimated. ))