Count+on+Subtraction


 * Pretest: Blackline Master 9 (Count on 1, Count on 2, Count on 3, Count on 0) - sent to Print Services 12-6-12 **

1.3A Model and create addition and subtraction problem situations with concrete objects and write corresponding number sentences. 1.5D Use patterns to develop strategies to solve basic addition and basic subtraction problems.
 * TEKS: **

1.3A 1.3B 1.5D 1.5E
 * Core Components: **
 * Including Statements **
 * Writes number sentences up to 18
 * Uses Base 10 Blocks to model addition and subtraction problem situations.
 * Applies knowledge of basic Count On **addition and subtraction** facts and Use Doubles **addition** facts in problem solving situations.
 * Uses Count On Strategy for addition
 * Uses Think Addition Strategy for subtraction Count On problems
 * Uses Use Doubles Strategy for addition
 * Uses doubles facts to solve problems.
 * Uses doubles plus or minus one to solve problems.
 * Uses fact knowledge of sums and differences to solve problems.
 * Models with counters or linking cubes.

**Whole Group Lesson Plans-**


 * You will need the Origo Subtraction Book for this- **

*//The Count On 3 facts (not including the Count On 3s that are also turnarounds for the Count On 1s and Count On 2s) can also be automatized with other fact clusters that will be taught later, either Use Doubles or Use 10 facts. The Count On 3 facts may be considered optional, especially if Count on 3 was not used when teaching Count On Addition.// 1. **Introduce** (Hands-on materials, stories, discussions, and visual aids are used to introduce the strategy.) 2. **Reinforce** (Activities that make links between concrete and symbolic representations of the facts. Students reflect on how the strategy or sub-strategy works and the numbers to which is applies.) 3. **Practice** (Games, strategy practice worksheets, and other activities to provide opportunities to apply and demonstrate knowledge of facts. Students should use mental computation only and try for fast recall.) 4. **Extend** (Students apply the strategy to larger numbers. Activities strengthen the students’ number sense.)
 * Teacher Note: ** The recommended order to teach Count On Subtraction strategies is:
 * Week 1-Count On 1
 * Week 2- Count On 2
 * Week 3-Count On 0
 * Choose one activity from each of the following- **
 * Teacher Note: ** The four stages of teaching and learning for the basic facts thinking strategies are:

Take it Away game- subtracting by counting one How Much More? game- finding the difference Cat and Mice game-calculating the difference
 * Independent Activities-**
 * These games are in Fundamentals and you have them in your stack of yellow games-**

1.3A, 1.3B separate, subtraction join, addition number sentence equation equals equal sign means “is the same as” unknown change sets models doubles, doubles plus one/minus one sums of ten counting on counting on to counting back
 * Vocabulary: **

doubles doubles plus one/minus one counting on sums and differences of 10 fact family
 * 1.5D, 1.5E **

**Questioning:**


 * How are addition and subtraction different? Similar?
 * How can knowing the process of one operation help with computation of another?
 * How does knowing an addition fact help you learn a subtraction fact?
 * What strategies are the most efficient in solving a given problem?
 * Given a subtraction fact, what is the Turnaround fact? What are the partner addition facts that complete the fact family?
 * How can “Think Addition” be used for learning subtraction facts?
 * For which addends is the Count On addition strategy efficient?
 * For which facts is the Use Doubles addition strategy efficient?
 * How can breaking numbers apart aid in the process of addition and subtraction?
 * How can we represent a given problem with numbers?
 * How can you use estimation to help determine if an answer is reasonable? :

KLRU: The Number Crew: Putting On and Taking Off (10:00) The Number Crew: The Mathematical Seven (10:00) Math Investigations: Part 01(26:00)
 * Technology:**

__If You Were a Minus Sign__ by Trisha Speed Shaskan __If You Were a Plus Sign__ by Trisha Speed Shaskan **Pet store Subtraction** Ribke, Simone T. **If you were a minus sign Shaskan, Trisha Speed** **The action of subtraction** Cleary, Brian P., **Hardworking puppies** //1st ed.// Reiser, Lynn. <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**The Hershey's Kisses subtraction book** Pallotta, Jerry <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**Shark swimathon** Murphy, Stuart J., <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**Monster musical chairs** Murphy, Stuart J., <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**Subtraction action** Leedy, Loreen. <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**Ready, set, hop!** Murphy, Stuart J.,
 * <span style="font-family: 'Century Gothic','sans-serif';">Resources: **