These signs were super helpful to me and my students when wrapping our minds around the new ideas in science education. 3D designed lessons and standards include the Science and Engineering Practices, Crosscutting Concepts, and the Disciplinary Core Ideas. I have explained each of these further below.Science and Engineering Practices: what the students/scientists do (the science)Crosscutting Concepts: how students/scientists think or the lens that helps students view the science Disciplinary Cor