Mental Addition Strategies Educ. 460 Unit Plan By: Jeannie Channell

Unit Plan

 Students will be able to solve two-digit addition problems using mental math.  Students will be able to identify different mental addition strategies through verbally explaining how they solved specific problems.  Students will be able to demonstrate how to use a hundreds chart to mentally add two numbers together.  Students will collect data to determine if using a calculator or using a brain is a more effective way to complete addition problems. Objectives

 2.NBT.5  Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.  2.NBT.8  Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.  2.NBT.9  Explain why addition and subtraction strategies work, using place value and the properties of operations. Common Core Standards

 Whole Class: I will engage the students in the content of this unit through an introductory video using Animoto. The video will give a brief introduction of the unit and what mental math is and how it is useful. The students will then listen to and sing along with a Place Value review song. Animoto.Place Value Lesson 1: mentally add multiples of ten to a number.

 Guided Practice Center  Independent Practice Center  Practice Game Center  Math Fact Center  Students rotate through each center every 15 minutes.  Students are leveled and placed in groups based on ability Lesson 1: Centers

 In this center I will reinforce the skills students have just learned by proposing several practice problems on the interactive whiteboard for students to complete on slates. I will ask questions to start a discussion about whether or not the tens or ones digits changed. I will assess through observations to see which students need added support.interactive whiteboard Guided Practice Center

 In the independent center students will be completing a practice sheet in a small group. Students will work to add multiples of ten to two-digit numbers. They will also work through problem solving questions and write a number story using two digit numbers. Independent Center

Students may play the lesson game, “Play a Game” or one of the review games listed below.  Ten frame game using NCTM Illuminations Ten frame game NCTM Illuminations  Place Value Hockey and Number Grid Game Place Value Hockey and Number Grid Game  Beat the Calculator Practice Game Center

Beat the Calculator Results

 Students will be playing Math Dash is small groups or will be going to Xtramath.com for some math fact practice Xtramath.com Math Fact Center

 I will first recap the lesson for students and go over the answers to the independent practice sheet. I will then assess what students have learned by having students complete the quick check assessment independently. Closing

 Voki Voki  Wordle Wordle Extras