Colleen 선생님의 4학년 수학 수업 - 분수 덧셈과 뺄셈

Adding and Subtracting Fractions
This unit’s focus is on adding and subtracting fractions and mixed numbers.  Lessons will be displayed using powerpoint or google slides.  Students should have a good understanding of grade 3 fraction concepts before taking this course.  Students should also have an understanding of multiplication, division, subtraction, addition and grade 3 level fractions as our warm ups will include this.  Students are encouraged to use manipulatives throughout the unit. I will include a paper copy of manipulatives.   Please take a look at the following description below to see if this class is a good fit for your learner. 
 
Each lesson will have the same format: 
* Warm up: we will do a math warm up to help turn on our minds to get ready for the lesson. A math question(s) will be displayed on a google slide. Students can record their thinking on a worksheet. Students are encouraged to share their thinking with the class. Our warm ups are focused on Multiplication, Division, Subtraction, Addition (up to 5 digits) and Fractions.
* Lesson: I will teach a lesson to the class. We will work together using anchor charts, manipulatives and powerpoint presentations. Students will “Watch Me First”, explaining a concept and work through a problem. Then through guided practice, students will work through the material with me. Students will be provided with a worksheet to record their thinking as we engage in the lesson. I will be using digital manipulatives.
* Independent work: Students will work on assigned work with support from me. Students will be provided with a worksheet. We will go over the work together.  Students are encouraged to share their thinking with the class.
* Game or activity to support the concepts learned in class.
* Reflection: Students will reflect on their thinking and how they feel about the math topic.
* Extension: Students will be provided with an extension activity that he or she can complete on their own time.  Extension activities are a support for learning outside of class time.  These activities are not evaluated by me.

Lesson 1 - Decomposing Fractions
Objective: Learners will practice decomposing fractions with fraction bars. For example: how many ⅛ sections make up a given shade fraction.
Activity: My name in fractions.  Please have something to colour with on hand.
Manipulatives: Fraction Bars
 
Lesson 2 - Decomposing Mixed Numbers
Objective: Learners will practice decomposing mixed numbers with fraction bars. For example: decomposing 1 ⅔ with a visual fraction bar for support.
Manipulatives: Fraction Bars
Activity: Roll and Colour.  Please have a paper clip, pencil and something to colour with on hand
 
Lesson 3 - Practice Decomposing Fractions
Objective: Learners will practice decomposing fractions and mixed numbers.  For example: students will be asked several questions and if they agree or disagree and explain their thinking.
Manipulatives: Fraction Bars
Activity: Fraction Battleship
 
Lesson 4 - Adding Fractions
Objective: Learners will practice adding two fractions with the same denominators. For example: 6/15 + 4/15 using fraction strips to show thinking.
Manipulatives: Fraction Bars
Activity: Fraction Addition Tic Tac Toe
 
Lesson 5 - Adding Fractions Continued
Objective: Learners will continue to practice adding two fractions with the same denominators. For example: decomposing the fraction 8/6 in two different ways.
Manipulatives: Fraction Bars
Activity: Five In A Row
 
Lesson 6 - Subtracting Fractions
Objective: Learners will practice subtracting two fractions with the same denominators. For example: ⅚ - 3/6 using fraction strips to model thinking.
Manipulatives: Fraction Bars
Activity: Fraction Knock Out
 
Lesson 7 - Subtracting Fractions
Objective: Learners will continue practicing subtracting fractions.  For example: practicing subtracting fractions   15/18 - 7/18 and drawing a model to represent thinking.
Manipulatives: Fraction Bars
Activity: Fraction Tic Tac Toe
 
Lesson 8 - Word Problems
Objective: Learners will practice answering word problems that contain adding and subtracting fractions. For example: Kate is making cupcakes. She has ¾ of a cup of flour. The recipe needs ¼ cup of flour. After she has baked her cupcakes, how much flour does she have left?
Manipulatives: Fraction Bars
Activity: Know or Go - Students Vs. Teacher