This teacher's guide provides the background information, STEM concepts, and strategies needed to successfully implement an early STEM curriculum (Ramps and Pathways) with young children ages 3 - 8. R&P actively engages young children in designing and building ramp structures using wooden cove molding, releasing marbles on the structures, and observing what happens. Chidlren use logical-mathematical thinking and problem solving skills as they explore science concepts related to motion, force and energy. This guide helps teachers to: structure and organize an engaging STEM learning environment; understand and promote logical-mathematical and scientific thinking during investigations; make the necessary accommodations and modifications for diverse learners, and assess STEM learning using formative and summative assessements. This one-of-a-kind resource uses a newly created Inquiry Teaching Model (ITM) as the conceptual framework and devotes specific attention to the importance of an inclusive and social STEM learning environment in which children are free to collaborate, take risks, and investigate within the context of exploratory and constructive play.