Topic: B. Computation:
Students will understand and demonstrate computation skills.
Common Assessment(s): Maine Lad Task: Guess How Many

Performance Indicators Students will be able to:	Essential Elements (Specific grade level learning objectives)			Suggested Performance Activities	Suggested Classroom Assessments	Vocabulary
1. Use and apply estimation with quantities, measurements, computations, and problem-solving.	Use and understand estimation			Students will estimate the answers to addition and subtraction problems by rounding to the nearest 10 or 100 and then do the mathematical computation. They can check their calculations with a calculator.	Given an example the students will round the numbers before adding and/or subtracting to the nearest ten. They will then add or subtract numbers to find answer. Then they will go back and do actual problem and compare both answers.	estimate guess addition add plus sum subtraction minus difference rounding reasonable problem solving
2. Use multiple strategies in solving problems involving addition and subtraction of whole numbers.	Problem Solving Addition Subtraction			Students will complete this example and similar word problems exploring different strategies. The farmer has 7 animals in all. He has 2 kinds of animals. Only 3 of them are chickens. How many animals are not chickens. Resources for math problems A Collection of Math Lessons grades 1-3 by Marilyn Burns & Bonnie Tank Posing and Solving Problems with Story Boxes by Donna Burk & Allyn Snider	Given a word problem students will select an appropriate operation and solve the problem. The solution will demonstrate some of the following strategies: guess/estimate and check, draw a picture and/or use manipulatives, to figure the problem out. They will explain their thinking orally, in writing, and/or drawing	strategies which operation equal part whole digits add subtract
3. Show understanding of addition and subtraction by using a variety of materials, strategies, and symbols.	Demonstrate addition and subtraction using a variety of tools. Draw Write equations Make models Use manipulatives			Students will practice writing and solving problems using a variety of strategies: drawing manipulatives counting up counting back grouping doubles greater/less than Resources: Interactive math word problems http://www.bath publicschools. com/fms/grade 2/cookies/ckho me.html> This contains samples of a variety of problems and solutions. Touch points activities	Students will solve basic addition and subtraction problems that include with and without regrouping, single and double digits by using manipulatives and/or other strategies. They will demonstrate their understanding of at least 2 strategies for solving the problem by drawing how they solved the problem. They will also write or tell about the methods they used. Students will be able to fill in missing addends and +, - signs. See K 1.	plus minus equal subtract add count on  count back doubles doubles + 1 manipulatives greater than less than addends