Differentiation with Mathscapes Gr 6

I'm trying to make sure my high achievers are well served in my class. I'm considering rearranging my routine and class systems to open it up to allow for more differentiation. I've learned that I have to set goals at the start of each unit, and make materials available for all of my students, and demand less control moment to moment while the learning becomes more student led rather than teacher directed.

I'm teaching Whole to Parts, lesson 8 right now to my 6th graders. Anyone have any input on my differentiation efforts specifically relating to 6th grade Mathscapes?

Long division

Teaching long division "the Maggie way" was very rewarding. I just finished day two and most of my fourth graders can not only do it, but can explain the hows and whys of what they are doing. The minipulatives and the new language worked wonders. I am a believer.

On a completely different subject, according to the new MLRs fourth graders are supposed to be able to visualize a square meter, so that pvc square and cube I invested in for place value will now pay further dividends.