Under each of these topics, there is a large quantity of information available AND it is very easy to use. I found this to be a sight I could spend a lot of time exploring. I was also excited by the appropriateness of this sight for educators throughout the k-12 spectrum. As the title suggests, this sight lists hundreds of great lesson plans. These lesson plans have been used by various k-12 teachers in their classrooms.
Subject areas span the curriculum - science language arts, math, elementary ed., social studies.
Also, when a teacher does a great lesson they would like other teachers to know about, they can simply add it to the collection. As a side note, I used a lesson plan from this collection when I taught seventh grade Chapter 1 Reading. It ended up being one of my student's favorite lessons. My exploration of this sight led me to believe it is targeted more at upper elementary students, especially when kids are using it independently. This sight shows kids how fun math can be.