We developed an opensource fifth-grade science and engineering unit on water, earth systems, and the structure and properties of matter, called Where Does Our Clean Water Come From and Where Does It Go After We Make It Dirty? How can teachers help students raise productive questions from phenomena and investigate their questions so they develop the targeted science ideas? Although the teacher plays a key role in helping students refine these ideas, students are part of identifying what they need and how to make progress. [Extracted from the article]