In my class we use Math and Reading rotation boards to manage independent work while I am working with small groups. It is an incredibly effective system, once you have got all your resources up and running etc. Writing is a little different. At the moment I have four writing groups. We start with a whole class lesson/ explicit teaching, then go back to our tables to write. My teacher aide (I get a small period of time 3 times a week) works with the 'slow starters', helping them get their ideas on paper. I work with another group on a teaching point. I then conference with the third group, and mark the last group overnight. Then it all changes the next day, enabling me to see as many students as possible. But there are always some fast finishers in our class who complete their tasks... and then what? First they are expected to edit their writing with a green pen, correcting capital letters and full stops. Some groups are beginning to use the dictionary or classroom resources ...
An average teacher trying to do the best she can with the little money she has.