I have used this book when I was a Teacher Assistant at Van Buskirk from January to May 2010. I had brought it from home because we were working on our Science Unit and I wanted to do something special with my students who were in a Duel Language First Grade Classroom. The students were very fascinated with the material that read to them and then they asked several question they were very curious to how these rocks were made. It's great for Science Unite. ( )