NASA

The NASA website provides information for educators and students. For both, it is broken down into grade levels and gives you topics and information appropriate for those students. It's not just planets and outer space. Although a lot of information is included about those subjects, other topics include flight, weather, and math. This site includes stories for different reading levels, videos, and games that focus on science and math concepts. There is also a picture dictionary for students who have a difficulty understanding certain vocabulary terms. In science, many vocabulary words that are used, are not heard very often in regular conversations. A dictionary to help provide clearer understanding of a tough word is great for lower readers and ESOL students.
NASA