## Common Core State Standards for Mathematics

Grade(s) K resources related to the following standard:
Operations and Algebraic Thinking
Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
4. For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.

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This iOS app requires students to use a ten frame to fill in the remaining addend with contrasting chips and then count them to tell how many more to make ten. The app can be set to build sequentially or it can be set to give random values. Additionally, the app includes an option to show number sentences when the problem is complete.
Activity, Interactive Media, Mobile App
In this 8-lesson unit students use buttons to explore logical and numerical relationships that form the conceptual basis for understanding addition and subtraction operations. Topics include counting, ordinal numbers (and relative position), classification (attributes), relationships between numbers, addition of sets, commutativity of addition, sums to 10, fact families (including subtraction), three models of subtraction ("take away", comparative, missing addend), and bar graphs. Includes student activity sheets and a link to an online graphing applet.
Activity, Instructor Guide/Manual, Lesson Plans, Unit of Instruction
In this 6-lesson unit, students explore 5 models of subtraction (counting, sets, number line, balanced equations, and inverse of addition) using connecting cubes. The lesson activities focus on the comparative mode of subtraction as children investigate the relationship between addition and subtraction, write story problems in which comparison is required, and practice the subtraction facts. The lessons include printable student activity sheets, a bibliography of children's counting books, questions for student discussion and teacher reflection, assessment options, extensions, and links to online applets (cataloged separately).
Activity, Lesson Plans, Unit of Instruction
This interactive Flash applet supports the exploration of early number. A child or teacher can place a number of objects on the screen and then move the objects to group them, drag them onto a number line or track, into a hoop to create sets of objects, or into a 10 by 10 grid. This applet lends itself well to group work with a projector. Clicking on the info button allows the user to mouse over items to learn how to use them.
Activity, Interactive Media
This 28-minute video contains a panel interview with three experts in the areas of math, cognition, and dyscalculia. The panel discusses the nature of dyscalculia, how to diagnose students with dyscalculia, and how to teach students with dyscalculia.
Events, Instructional Strategy, Community, Video
Grade Level: K, 1, 2, 3, 4, 5, 6+
Resource is part of a PD collection
In this iOS App students recognize numbers of dots on dominos and identify their value, compare their values, and use their values to complete addition or subtraction equations up to ten. The first four levels of this App are free for calculations with numbers to ten, there are more levels and tasks available for a fee. Within each level of the App there are two buttons in the upper right corner. One is a camera button that will take a picture of a finished sheet and the other is an activity button that opens up more complicated equations with multiple operations.
Activity, Interactive Media
This 37-page pdf provides background information and teaching activities for developing young children's number sense. The document includes instructions and printable materials for using dot cards, five frames, and ten frames.
Activity, Game, Instructional Strategy, Lesson Plans