I am voting FOR your idea because I could see it being more effective for student learning. The differentiation is so much more endless that way, and I think organization would be a breeze for you and the kids. The only thing that would be tough, as a PP mentioned, is finding enough activities however there would be some activities you could swap. IE on Monday the low group might do a particular word sort, and on Tuesday you might move the same wordsort to a higher group but have them enrich it, by maybe breaking up the words into syllables or identifying more about the words that way?
I think the students could really benefit from this, they would always know where they needed to be and would really bond with their groupmates. I think this method sounds incredibly purposeful and I WOULDN'T feel daunted by the task of creating all of the different centers.
Also you could keep the same materials at a center for a whole week and have the students do different things with the materials each day. For example, you have some sight words or vocabulary words on index cards. Monday they alphabetize them, Tuesday they break them into syllables, Wednesday they sort them by part of speech (or whatever - I'm thinking according to my own class here) AND the differentiation would be in the difficulty of the words AND the activities. A low group might have basic sight words they're still familiarizing with and working on phonics stuff, a higher group might have tougher words and be working with vocabulary, grammar, and comprehension using the words. ETC
I like it. I say try it... see what you can do!
