I have used this tool as both a student and an instructor. Needless to say, I have spent many hours with this tool. The content is very good and the website lends itself to be a very effective tool to enhance learning and teaching. It presents concepts and models that are educationally significant in many different formats, which I find to be very efficient in learning and teaching. The presentations direct students through the learning process and the material is arranged in a logical order that moves students through their learning process at their own speed. The students have access to the materials, as long as they are near a computer, and can go through the material as many times as they need to understand. As a teacher, I found that the material helped the students learn the material because of the many different approaches it takes. The website uses video, pictures, discussion based notes and activities based on real teachers experiences in the classroom which makes it more personal to the students. There are also a lot of additional resources that students can access to help them learn and that teachers can use to enhance their teaching. The material is very easy to use. I have a fellow teacher (math) who is, shall we say, technologically challenged who went on to the website to review it for a class that she was taking to finish her clear credential. Not only did she enjoy the material and its organization (she went through all of the lessons) but she learned a lot about evolution and has a better understanding of why science teachers love doing what they do!
I would suggest a faster connection (like DSL) to aid in viewing the videos. I had no problems accessing any of the materials.