Lesson Plan ID: 
13223 
Title: 
Adding and Subtracting Mixed Numbers 
Overview/Annotation: 
During this technology based lesson, students learn how to add and subtract mixed numbers by exploring websites on the Internet. Students demonstrate their knowledge of fractions by participating in practice activities on the Internet. 
Content Standard(s): 
TC2(35)  8. Collect information from a variety of digital sources.  TC2(35)  9. Use technology tools to organize, interpret, and display data.  MA2013(4)  14. Understand a fraction ^{a}/_{b} with a > 1 as a sum of fractions ^{1}/_{b}. [4NF3]  MA2013(5)  11. 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. [5NF1]  MA2013(5)  12. 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. [5NF2]  MA2013(5)  16. Solve realworld problems involving multiplication of fractions and mixed numbers, e.g., by using visual fraction models or equations to represent the problem. [5NF6] 

Local/National Standards: 

Primary Learning Objective(s): 
Students will add and subtract mixed numbers. Students will write fractions in simplest form. 
Additional Learning Objective(s): 

Approximate Duration of the Lesson: 
61 to 90 Minutes 
Materials and Equipment: 

Technology Resources Needed: 
Computers with Internet access, LCD projector 
Background/Preparation: 
Students must have a basic understanding of fractions and mixed numbers. 
Procedures/Activities: 
1.)Begin the lesson by reviewing what students already know about fractions. Allow students to demonstrate what they know by coming to the board and showing fractions.
2.)Then go to the websites below and allow students to view presentations about mixed numbers and fractions. The teacher can select any of the tutorials he/she feels is appropriate for students' knowledge level. ( Math Practice) This site has several attached presentations about fractions.
4.)After teaching students how to add and subtract mixed numbers,
 Find the Least Common Denominator (LCD)
 Find the equivalent fractions.
 Add or subtract the fractions and add or subtract the whole numbers.
 Write answer in lowest terms, let students visit the websites for practice. ( Adding Mixed Numbers) This site has practice problems for students to work on adding mixed numbers.
6.)After students have a good understanding of how to add and subtract mixed numbers, allow them to demonstrate their knowledge by working problems from the website below. Keep track of students' work for a grade. ( Visual Fractions) This site helps students understand fractions.

Attachments:**Some files will display in a new window. Others will prompt you to download. 

Assessment Strategies: 
The teacher will assess students' work on the computer for accuracy. The websites will show the teacher the number of problems each student gets correct and incorrect. 
Extension: 

Remediation: 


Each area below is a direct link to general teaching strategies/classroom
accommodations
for students with identified learning and/or behavior problems such as: reading
or math performance below grade level; test or classroom assignments/quizzes at
a failing level; failure to complete assignments independently; difficulty with
shortterm memory, abstract concepts, staying on task, or following directions;
poor peer interaction or temper tantrums, and other learning or behavior problems.

Presentation of Material

Environment 
Time Demands 
Materials 
Attention 
Using Groups and Peers 
Assisting the Reluctant Starter

Dealing with Inappropriate
Behavior 
Be sure to check the student's IEP for specific accommodations.

Variations Submitted by ALEX Users: 
