PebbleGo Next focuses on Science, Social Studies, and Biographies for grades 3-5+, but it would also be helpful for older grades as well (long articles). PebbleGo focuses on Animals, Science, Biographies, Social Studies and Health for grades K-2 (we’ve had this a while).
Username: nanjing
Password: school
Science topics in PebbleGo Next: Earth Science, Life Science, Physical Science, Technology and Society, and the Field of Science.
Social Studies topics include: Culture, Economics, Fields of Study, Geography, and Technology and Society.