I'd like to share another activity that I've put out on the science shelf during our study of the life cycle of apples. I've had these cards printed for a few years but this is the first year I've put them out. These cards are from the wonderful website, Prekinders.
Each card has four pictures with one picture that is different. I added a little basket with green marble chips. To do this work the child lays out the cards and places a marble chip on the one that is "different." I have been surprised how difficult this is for many of my children. Still, they are choosing this from the shelf quite a bit. On the Montessori For Everyone website under the Free Downloads section in the Language section, Lori has a similar activity called "What Doesn't Belong?". I may print that out to add to our classroom shelves later. I am filing this post under "language" even though it's on my science shelf. Being able to discriminate and categorize is an important skill for reading and writing. If I print out the "What doesn't belong?" activity, I'll probably put it on the shelf with my other pre-reading activities.