I prefer being really flexible for anything I do with my toddlers so I don't follow a specific program and we are constantly changing and adjusting. I'm sure that anything I've posted in the past we finished or stopped doing a looong time ago.
But O, my almost 3 year old, wants her own "class" and it is really helpful to devote 20-30 minutes to my two little girls before starting school work with my older kids.
We start by reading books together. They will usually pick a few that they are currently interested in, and I pick a few as well. The ones I pick we usually read for 2-4 weeks at a time, and have more of a learning aspect to them. Sometimes we read the books and sometimes we look at the pictures.
Books I've picked for November:
A book from My First Bob Books Pre-Reader Collection which includes the
Alphabet set and
Pre-Reading set -- I don't read these to teach my girls to read, but because they are simple and have a lot of familiar pictures for them to identify. They also like them because my older kids have used the other collections as they were learning to read, so my girls think they are using "big kid" stuff. And there are stickers.
Go, Dog. Go! by P.D. Eastman -- has colors, opposites, and lots of DOGS, my girls' favorite animal.
Before Five in a Row books -- The Five in a Row books are wonderful, but I prefer to just use the book lists for wonderful picture book ideas. Jesse Bear is very well-loved and O is always asking for it!!
After we've read for a little while we play games. Right now they like laying the memory cards face up and making matches. In the past we've done puzzles, played with babies or other toys, and sometimes we also do activities like Head, Shoulders, Knees and Toes or Ring around the Rosies. We also sometimes sing songs together - they are really getting into a song we are learning in anticipation of Christmas called
Christmas Bells.
After about 30 minutes I let them pick some toys from the closet that are just for school time -- we have a house set, barn set, Noah's ark set, space ship set, blocks, puzzles, and quiet books. They also will join in when we are doing something they can participate in such as coloring, nature walks, listening to stories, etc.
My school age kids each have their own tote which holds their individual books and notebooks, such as math workbooks, books they are reading, and their notebooks for copywork, history, science, etc. 
In our school area we have 4 small bookshelves and they are all covered with books, mostly books the kids can read or look at any time they want, though I have a couple shelves for my notebooks, library books, future books for school, and other totes for several subjects. For example, one tote holds our nature guide books, compasses, flower presses, and anything we might need for nature studies. 
N's journal pages - (L) Jan 09 (R) Nov 09
Initally we didn't know we were seeing the pronghorn (which are not really part of the antelope or deer families), but thought they were deer. But my dad set us straight when he was visiting a few weeks ago. And when our November issue of Ranger Rick showed up highlighting these beautiful animals we knew it was time to learn more!!