Below is a picture of the inside of another center file.
Everything fits inside nicely, and I use a clip to keep the folders closed.
Below is a picture of what the envelopes look like that I usually use. I like to put a title on the front of the envelopes so the kiddos know which envelope the cards go in.
I store the folders in the magazine holders shown below. I bought them at Big Lots over the summer. Right now I am organizing them by the subject and theme we are on, but I might have to rethink how I organize them when we fully implement Common Core next year.
I saw the idea below for storing task cards last summer, but I don't remember whose blog it was. I found the coupon holders at Target's Dollar Spot, and I bought the baskets at Big Lots. The holders fit nicely in the baskets. Everything is labeled and I can easily grab what I need.
How do you organize your centers? I would love to hear your ideas!