Topic maps tell you what topic you will be learning and when. Most are done on a monthly chart so you can look and see what is being taught in that month and what is coming up down the road. A few of the maps are done quarterly, but have the same concept of finding out what is being taught and when.
Just choose a grade level from the left hand column and click on the subject area. If you can't find what you are looking for, be sure to check the Other Topic Map option. More topic maps will be added to the site as they are completed. Maps will also be updated with changes from year to year.
What a great way to check out what is happening in the classrooms.