You might also mention that any behavior in a class of a half dozen is under a microscope.

Have her imagine a class of 6 kids, 20 kids, 35 kids and in college sometimes you have a room full of a hundred kids, and a football stadium full of kids and compare in her imagination a non stop coughing fit by one person. Very disruptive in a group of 6, mildly annoying in a class of 20, 35 kids you might register someone is coughing, 100 kids just background noise and stadium full you might never know someone was coughing.

So she might need to use the basket method of choosing her battles....

basket A is unacceptable behavior and worth her energy (usually possible injury, hurt feelings, rude, unacceptable)...someone needs to be informed about basket a behaviors and action needs to be taken (May or May not be her needing to take action).

basket b might be all that stuff that would just be ignored in a bigger class that is just magnified because of the small numbers ignore it, don't get worked up about it. File it in basket b and move on.

Basket c might be the stuff that she isn't sure if it is totally basket b and she needs a place to file it temporarily, might need to discuss with SW or you at a later time to get perspective on.

It helps to visualize placing the situations in the proper baskets.

And she might even realize that the kids are special needs kids and they might just fill her basket b to the tippy top (just the nature of their special needs) and that might make one thing going into basket A be the thing that kind of pushes her over the edge. More frequent emptying of basket b might help (which would be activities like the sewing, running an errand for a teacher, a trip to the bathroom, a little deep breathing). After a while, her goal would be to not even note in her head basket b stuff.

Good luck