Teacher Resources for Instructional Planning


Grade 3, Math Std 2 : Solve addition and subtraction problems, including word problems, involving two- and three-digit numbers with and without regrouping. Estimating sums and differences by using compatible numbers, front-end estimation, and rounding Examples: compatible numbers--- 24 + 26 = 25 + 25 front-end estimation--- 72 is approximately 70 -36 -30 rounding--- 172 is approximately 200 +369 +400 Demonstrating computational fluency in addition and subtraction

Lesson Plans: Front-End Estimation The teacher will introduce front-end estimation. Students will practice using front-end estimation in simple addition and subtraction examples. Grocery Store Grab Students will learn to use estimation strategies to estimate the amount of money they are spending at the "grocery store" in this small group game. Snake Students will increase proficiency in basic addition, subtraction, multiplication, and division facts. Easy Addition This lesson gives students an alternative way of adding if they are having trouble with 'carrying' and is faster and more accurate than other methods. Upon completion of this lesson, the students will be able to add quickly and correctly using this alternative method. Keys for Math Students will list key words for addition and subtraction word problems. Associative Connection Students will be able to use the associative property to work addition problems. Property Feud Students will be able to recall and apply their knowledge of the addition properties (commutative, associative, and Identity). Addition and Subtraction Game A group activity that provides review and drill in the format of a game for learning facts in subtraction and addition. Among the Odds and Evens: A Tale of Adventure Students will formulate the pattern that the sum of two even numbers is even, the sum of two odd numbers is even, and that the sum of and even and odd number is odd. Plus One, Minus Two? Students will use a mental math strategy to add and subtract two double digit numbers quickly. What's the Code? Students will use area codes to practice addition and subtraction of three digit numbers. Literature Computations (Scroll down to Mathematics → Computation → Literature Computations) The focus of this 10 lesson unit is to teach computation through the use of children's literature. Two-Digit Subtraction with Regrouping Students will demonstrate how to regroup two-digit numbers and solve advanced subtraction problems with regrouping. Each student will use straw and cup manipulatives to demonstrate how to borrow from the tens place in order to solve the problem. Double-Digit Addition with Regrouping Students will create and manipulate double-digit regrouping and identify ways to use regrouping. Two-Digit Subtraction Students will use number strips and other manipulatives to subtract two-digit numbers. Three-Digit Addition Students will create and manipulate three-digit addition problems. Includes two PowerPoints on addition. Three-Digit Subtraction with Regrouping Students will use spinners to form ten three-digit subtraction problems with regrouping.

Resources: AAA Math Third Grade Utilize the following sections for online activities to support this standard: Rounding and Estimation; Properties under Contents by Topic; and Relationship between Addition and Subtraction. Math Baseball An online resource for mathematics practice. Word Find Students can work online puzzles or create your own puzzles and print them out. Math Story Problems Students will experience a variety of story problems requiring a variety of strategies. Students may summit their own story problem. Story Problems with Mixed Practice Students will work online word problems. BasketMath Interactive An Interactive game covering a wide variety of mathematical concepts. A Maths Dictionary for Kids by Jenny Eather The Maths Dictionary is animated, interactive, and allows students to practice their math skills. Over 500 terms are explained in simple language. Click on "billion" and discover that you have 10 billion brain cells working for you right now. Roll your mouse over the world time zone chart and you instantly know the time for that part of the world. Every math teacher should bookmark this Web site. National Library of Virtual Manipulatives Virtual manipulatives related to NCTM standards in the areas of Number & Operations, Algebra, Geometry, Measurement, and Data Analysis & Probability. To access tools, click inside the grid on the cell that matches the grade level and standards area desired. Figure This! From NCTM: Three to four math challenges using real world examples are posted here each month. For those who need help solving the challenge, there are hints and complete solutions, along with related problems. Shocking Mathematics Safety instructions for lightning storms are provided along with addition and subtraction exercises in this lesson plan from NASA Explores.
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Addition and Subtraction Game A group activity that provides review and drill in the format of a game for learning facts in subtraction and addition.

Addition and Subtraction Game
A group activity that provides review and drill in the format of a game for learning facts in subtraction and addition.