[原版教材]美国数学学习教材 Box It or Bag It, Grades K–2

Box It or Bag It is a math program for K–2 teachers who want to surround children with a language-enriched, activity-centered learning environment. Students enjoy hands-on experiences with a variety of materials and are encouraged to learn from each other as well as the teacher.
Box It or Bag It provides a year's worth of whole group and independent practice for students in grades K–2. In addition to engaging lessons the Teachers Resource Guides feature daily calendar activities to teach, reinforce, and extend skills. Topics include sorting, measuring, graphing, addition, subtraction, money, and more. Themes incorporate a variety of other subjects such as language arts, science, health, music, art, and physical education. Practice and Enrichment Boxes are optional extensions of the program.
同样地, 这套教材也是在训练学前孩子观察、理解、分析能力，强化图表在数学学习中的应用和重要性。

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