In What's the Matter? children learn the various states most things are in --gas, liquid or solid, including what makes water take these forms. New terms such as change, spew, melt and ash are also introduced. ELF Science books are written to correspond with Next Generation Science Standards. This advanced Level (Green) covers the recommended content for 2nd grade students. This advanced level of science bundle for students features a book with beautiful photographs that discusses the featured topic, glossary, quizzes, vocabualry, and games. On page Spanish language support is available by tapping the globe in the bottom right hand corner. On page parent support is by tapping the handholding icon in the bottom right hand corner. Each word on the page is tappleble for beginning readers. Users can also tap the play button to hear the text read aloud. Downloadable PDF Teacher Resources contains: pre and post tests, 3 teacher cards (task, read, ELL), family time flyer in english and spanish, and rewards for hardworking students.