Informal learning experience is any learning experience that takes place outside the formal structure of the classroom (Macia & Garcia, 2016; Sullenger, 2006). Interest and motivation are important components in inspiring students to pursue science and mathematics learning. Informal learning experiences have the potential to support students’ learning and engagement in a formal learning environment by presenting opportunities for students to make the connection between textbook knowledge and real-world contexts and build a deeper understanding of the science or mathematical concepts. Roberts et al. (2018) reported that informal STEM learning experience helped students find purpose in formal school learning and extended their STEM content learning and involvement. Cases on Teaching and Learning Science and Mathematics through Informal Learning Experiences will present a rich collection of case studies that offer unique perspectives on how informal learning experiences can contribute to science and mathematics classroom instruction. The impact, challenges, and opportunities associated with informal learning experiences on science and mathematics teaching and learning is described, analyzed, and synthesized for the objective of offering a valuable resource for those seeking to integrate informal learning experiences into their science and mathematics classroom instruction. This book is intended for teacher educators, K-12 teachers, professional development educators, parents, as well as informal educators who are interested in understanding and harnessing the potential of informal learning. It offers a valuable resource for those seeking to integrate informal learning into their educational and training programs, and for those seeking to support and promote lifelong learning in individuals and organizations.