Great Minds offers Levels K–2 of PhD Science as an open educational resource (OER). We know that even our youngest students have a natural curiosity about how the world works, yet schools often provide only occasional science activities for early elementary learners instead of a coherent science curriculum. We wanted to ensure that these students would have rich, knowledge-building science experiences that will help them establish a strong foundation for learning science later in elementary school and beyond. Educators can access the curriculum’s Teacher Editions and Science Logbooks for free on our website. To support the hands-on activities and reading of core texts integrated into the lessons, please contact your Great Minds representative.