Title: Lesson 8: Assessing Addition and Subtraction of Fractions With Like and Unlike Denominators
Standard(s): 5.NF.A.1
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12 (In general, a/b + c/d = (ad + bc)/bd).
5.NF.A.2
Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.
SMP#2 Reason abstractly and quantitatively.
SMP#7 Look for and make use of structure.
Lesson Overview: This lesson will review the previous days skills learned. This lesson will take the introduction of adding clocks on fractions to now subtraction fractions with unlike denominators.
Resources or Materials Needed
Time: 30 Minutes
Step 1: Pre-Instructional Activities
Step 4: Assessment
NA
Standard(s): 5.NF.A.1
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12 (In general, a/b + c/d = (ad + bc)/bd).
5.NF.A.2
Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.
SMP#2 Reason abstractly and quantitatively.
SMP#7 Look for and make use of structure.
Lesson Overview: This lesson will review the previous days skills learned. This lesson will take the introduction of adding clocks on fractions to now subtraction fractions with unlike denominators.
Resources or Materials Needed
- T Chart
- Blank clock template (Appedix C)
- White Boards and Markers
- Pencils
- Notebooks
- Anchor Chart Paper
- 10 x 10 grid paper
Time: 30 Minutes
Step 1: Pre-Instructional Activities
- Students will have a discussion about what they have been working on the past two days
- The teacher will discuss with them that they will be taking an assessment on what they have been working on. They may not use a clock template, unless specified in an IEP.
- Students will have a discussion about what they have been working on the past two days
- The teacher will discuss with them that they will be taking an assessment on what they have been working on. They may not use a clock template, unless specified in an IEP.
- Students will have a discussion about what they have been working on the past two days
- The teacher will discuss with them that they will be taking an assessment on what they have been working on. They may not use a clock template, unless specified in an IEP.
Step 4: Assessment
- A pre-assessment indicated that the students do not have a very good understanding of fractions, specifically adding and subtracting fractions with like and unlike denominators
- The teacher will circulate around the room during the group time and observe student’s understanding of the content
- Students will complete a post assessment at the end of the instructional unit
- A video Camera will be given to small groups of students to make a video to show they know multiple ways to answer the questions on the post assessment. This will help the students develop a more in depth understanding of the content
NA