I thought about it and an alternative is to go back to grouping high, middle and low students together. That way those who grasp the material quickly and are ready to move on can. Those who need extra support and reinforcement will get it. The standards should be developed for what the mean is expected to reach if school performance is going to be judged by these standards and not the exception.
There will always be exceptions to the mean. We will always have high and low in a classroom. It is just the reality. Brains are not wired the same. The people who set up the standards failed to acknowledge this fact as far as I'm concerned. To say that all students should be proficient in x amount of time is setting some students up for failure at the gate and thus leaving them behind.