That one got a slow blink out of Kanan, right there.

"... The class you're co-teaching with Skywalker?"

Because Kanan could do 'substitute teacher' or even 'guest lecturer' if it came down to it. Hell, he could even tolerate Anakin if it meant knowing for sure whether or not they had just cause to fear for their lives. But that would be one hell of a class all the same, wouldn't it?