In this lesson, students utilize spatial, mathematical, and analytical skills to determine how much fresh water is present on Earth. The lesson has a very engaging introduction and follows a comprehensive flow, guiding students toward a thorough understanding of the amount of water on Earth. I appreciate how the lesson encourages students to discuss, collaborate, and use different mathematical strategies as they complete the activity. There are some great resources provided as extensions and follow-ups for the lesson. Overall, this a great lesson with an emphasis on math and Earth science.