Here's the article that got me started
The thing I love about the article is how she explains that the highest group starts with the indep. practice because they can handle that. The lowest group starts with you.
math with teacher
math on paper (indep. practice)
*This will be my 4th year of math workshop. Due to larger classroom numbers last year I added a 4th rotation (fact fluency- math fact practice)
I have a tub like this (double deep version for the game center)
for each center to hold the supplies needed. The kids take them to the designated area. (math games- carpet area, math on paper- at tables with privacy folders, math with me is on the carpet by the smartboard)
I use a digital time from Dollar Tree for the rotations to keep us all on track.
The groups change for each topic (about weekly), but sometimes a few will be switched if I feel that I need to bump them up or down. I change activities daily, but don't feel that you have to in the beginning. I didn't and the kids were fine with that too (especially if they really liked the game).
I only use a few of their games. Sometimes I even forget to check theirs. I like more manipulatives & colorful games. Some good sources are
Centers & Games Websites
Also you can find game freebies on teachers pay teachers and even google images by just searching for the skill and using second grade or game/center in your search terms.
If you have any other specfic questions, I'd be happy to share what works for me.