look for and express regularity in repeated reasoning.construct viable arguments and critique the reasoning of others.make sense of problems and persevere in solving them.These goals are aligned to the mathematical practices in the Common Core State Standards. Operations and Algebraic Thinking: Standard 2.OAĪdd and subtract within twenty Goals for Student Understanding Represent and solve problems involving addition and subtraction. Operations and Algebraic Thinking: Standard 1.OA Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.Ĭlassify objects and count the number of objects in each category. Operations and Algebraic Thinking: Standard K.OA Know number names and the count sequence. Common Core State Standards for Mathematics

After reading the story, students solve an open-ended problem (a problem with more than one solution) at their tables, then reconvene as a whole group to process the experience and share and discuss their strategies.

Using real photographs of wildlife, the storybook captures what happens when forest animals encounter a snowman (the stranger) in the woods. Sams II and Jean Stoick, provides a magical context for the problem. The literature piece Stranger in the Woods: A Photographic Fantasy, by Carl R. This lesson is an engaging opportunity to learn about students’ level of understanding of number, specifically the strategies and models students use to represent their mathematical thinking. Dana Islas is a Math Solutions consultant, kindergarten teacher at Pueblo Gardens Elementary School in Tucson, Arizona, recipient of the Presidential Award for Excellence in Mathematics and Science Teaching, and author of the multimedia resource How to Assess While You Teach Math: Formative Assessment Practices and Lessons, Grades K–2.

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