I am currently teaching 6th grade in my first teaching position. I have two really, really smart/advanced students. The rest of of class (31) are behind. Whenever I give a test, these two students score perfectly. They are finished in 20 min, the other students take close to an hour. My instruction is at a slow place to reach the 90% of the classroom. My materials that I am using are very outdated. The math in general is like baby stuff to these advanced students. However, it is really hard for the majority of my students. I give early finisher work to these two students all the time. I also have them read when they finish classwork/tests early. They complain to their parents that the class is too "easy."What should I do. I know the "strategies" to use, but these students are are finished with their work 10 times a day. I don't want to keep feeding them work assignments over and over again.