Build your student's mathematical understanding with the Singapore method. Math In Focus 2020’s concrete-pictorial-abstract learning cycle develops a solid foundation in math concepts, problem-solving, and critical thinking using strategies such as visual models, abstract symbols, and hands-on learning. The Teacher Edition Volume A supports the Student Edition Volume A (sold separately) with instructional support, questioning techniques, and keys to facilitating conceptual understanding. Each chapter begins with a background overview followed by a skills trace, teaching resources with model problems, as well as an in-depth planning guide. Covers half a year of instruction. 400 pages, softcover.