The one thing that you do need for the strategy to work though is a positive classroom. "The best place to start on the road to differentiation is building a positive and inclusive learning environment which fosters mutual respect for all learners where students encourage and support each other." Walsh once again nails it because the learning environment must be one that in conducive to learning. If a child feels judged or scared they many shy away from doing alternative activities that may help them greatly. This means the it has to be a respectful and learning centered environment. You also must know your students. In our practicum class we often talk about knowing who your students are. This is key from differentiation. By knowing how your students learn you are able to make things for them where they can succeed in the classroom. You can form lessons and things for them to be able to maximize their time in the classroom. Isn't the classroom all about maximizing potential of students? So if you know them and can change things for them you can maximize time and potential.
I believe that myself as a Physical Educator need to have many techniques to go to, to be able to help my students learn and achieve better physical fitness. I would start with kids at the bottom. What can I do to help them better understand why physical fitness is important? They perhaps don't have as good of a grasp on why it is important to their lives as some one who is extremely fit. So right there I could differentiate some of the material for them to maximize their understanding on its importance. I could also have some physical activities that they could see success in thus getting them more excited about the physical activity. Then for the kids who may be way far ahead I could challenge them greatly with things like heart monitors that Jen Neubauer showed us in Technology Lab. I would have them try to be in their target heart rate zone for so long during class. I could also help their understanding with more of the nutritional aspects of health. This would give me many activities and learning points to go over with my classes. Obviously the main goal would be movement in the gym but I believe there is much to gain learning wise in the gym as well. So if there are things to learn you must differentiate that for you different students.