I finally have work time going for all my class now. I started it slowly by having the ones who finished their traditional classwork choosing work to do from the shelves. I have run out of shelf room (I ordered the teen and tens board set from Sue at Montessori Steps). Really nice sets that came with cards you can use as 3 part cards. I'm going to have to figure out how to rearrange some things to get more room. I am in the process of making my traditional tasks from the past two years more Montesssori-ish by adding control cards. For these items I am using my drawers from last year as I am out of space. It works pretty well. Each child has a colored folder and the folder corresponds to a drawer. In their folder are the response sheets for tasks I want them to do. They match the sheet to a miniature version of it on the manipulative/hands-on material it goes with. For example, for pink series word work I put the pink word work book in the child's folder. They go to their drawer and in it, they will find a pink book attached to a ziplock bag that contain the picture and word cards, a control chart, and photographed instructions for what to do. They take the ziplock bag and word book to their choice of work space and do the activity.
I am using a folder system right now, to ensure that all students are working on something on their level. I have a checklist of their "have to's" that I check off when they complete. I use a 3 "have to's" and then choices system. This also keeps the children from fighting over the most popular choices as they finish at different rates.
I would love to eventually go to an all choice work system, but as this is all new for me, I feel the need to take baby steps.