Makes me sad but happy

As most of you are aware, I have an advanced class which last year was not respective and would not perform any task I assigned them.  Now, I know why!  They had been allowed to do as they wanted, which apparently was goofing off in the cosmetology class.  This year they told me that they did not know the material.  I have explained to them that we will be going back in order to review the material, starting with Salon Services 1 curriculum.  I expected them to start fussing, but to my surprise, they did not.  We went back, all the way to Chapter 1 and with a quick review, we went through the entire chapter.  The majority were very cooperative and responded well to the review.  They just needed to know that someone cares about them and their education.  I cannot help but remain being concerned that this will last.