It all depends on the schools and states where the schools are located. In our high school we teach a popular course interior designing, amongst personal sewing, professional cooking, baking & pastry classes and cultural cuisine classes. Which class runs depends on how many students sign up for it. As money has becomes tighter the minimum number of students in a class rises and thus more classes end up being cut if not enough students sign up. The interior design class teaches students basic sewing and students can work on special personal sewing projects for this and the other sewing class. I know the F/CE (Family, Consumer Education) instructors and they do put in lots of extra after school time to assist students in their quest to become effective sewers.
So most likely if these classes are not running elsewhere it is based on student numbers registering for these classes.