when did kari michealson leave the show?

According to IMDB.com Kari was on the show from 1981 to 1986.

It was towards the end of the fifth season that all three of the girls (including the one played by Kari Michaeslon) were termanated. It was at the beginning of the sixth and last season that the show, more or less, became a joke in its own time! In any event, I would be very interested in corresponding with the person who started this thread. I would like to know whether the fact that he or she enquired about Kari Michaeson's character is because they especially liked the part that she played.

i wonder why they were terminated ,is it because they were grown now and longer nells supervision?

Sam was on a couple of episodes but can not remember witch episodes Sam was on