The shift to 3-dimensional learning in science education not only means teachers need help and time to adjust, so do our students! How do we ready our students for this change? What’s the best way to do this? I’m not sure but I’ll tell you how I’m going to do it. Before my classes start diving into chemistry concepts I’m going to have them do an investigation in which the focus will be developing the skills necessary for using science and engineering practices (SEPs) to explain crosscutting concepts (CCCs). This way when we begin chemistry concepts we have a reference point. The disciplinary core ideas in this investigation are (hopefully) review for my students (matter is made of particles and energy flows). To do this, I’m going to take an old lab (Reaction in a Bag) and refine it to fit my needs. You’ll find everything below!