I'm not sure if I'm using "flounder" right.
Ms. R was familiar with Student M, the sixth grader. She expected him to continue to sail through 7th grade in a similar style to 6th grade. But in 7th grade, when expectations increased and the student began to flounder, Ms. R had no idea.
Is "flounder" the right verb here? Or is there some other verb used in connection with sailboats?
I want a verb that means that the sailboat is having trouble staying upright, i.e. not capsizing.