## Common Core State Standards for Mathematics

Grade(s) 1 resources related to the following standard:
Operations and Algebraic Thinking
5. Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

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This 5-lesson unit is intended to help children who already understand the meanings of addition to develop fluency with addition facts. The activities and games take advantage of commutativity, the additive identity, doubles, and number patterns to develop operation sense and foster retention. Lessons include student materials, questions for students and teachers, assessment ideas, and links to interactive applets.
Activity, Game, Instructional Strategy, Lesson Plans, Unit of Instruction
Resource is part of a PD collection
In this 6-lesson unit students use pasta shapes to explore the take away model of subtraction in several different contexts (counting, sets, number line, balanced equations, and inverse of addition). They decompose numbers, explore the zero property, act out subtraction situations with objects and pictures, record differences with vertical and in horizontal notation, create fact families, find differences with a calculator, and compose and solve problems involving subtraction. The lessons include student activity sheets (pdf), questions for student discussion and teacher reflection, assessment options, and links to online applets.
Activity, Game, Lesson Plans, Unit of Instruction
This problem provides an opportunity for children to practice skip-counting and counting on. It lays a foundation for the concept of multiples and proportional thinking. Using linking cubes of two different colors, one color grouped in 2s and the other color grouped in 3s, children look for ways they can make a line of one color equal to a line of the other color. The Teachers' Notes page offers suggestions for implementation, discussion questions, and ideas for extension and support.
Activity
This activity uses Cuisenaire Rods to develop flexibility and fluency with addition facts and to encourage systematic thinking. Several different challenges are posed, all involving making equivalent trains using a given number of rods of different colors. An interactive Flash Cuisenaire applet is provided as an alternative to using real rods. The Teachers' Notes page offers suggestions for implementation, discussion questions, ideas for extension and support, and a link to a related activity, Cuisenaire Counting (cataloged separately).
Activity, Interactive Media
This iOS app contains six different math, logic, and puzzle games: Tower of Hanoi, Magic Shapes, Ravine Crossing, Math Comics, The Frog, and The Water Jug. Each game contains various levels of difficulty to challenge students.
Activity, Game, Interactive Media, Mobile App
Grade Level: 1, 2, 3, 4, 5, 6+
This document provides descriptions and examples of what each Mathematics Common Core standard means a Grade One student will know, understand and be able to do. This "unpacking" of the standards provides instructional guidelines and was developed to assist North Carolina educators teach the Mathematics Common Core (Standard Course of Study).
Reference Materials
This sample constructed response problem for K-2 students provides an opportunity to analyze patterns and develop algebraic thinking in the context of plant growth. It includes suggestions for adjusting the challenge level and a task-specific rubric with annotated samples of student work at each level. Free registration allows users to download a 9-page print-friendly version (pdf).
Assessment, Activity