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Is your final answer positive (+) or
negative (-) ??
.
Introduction
In this lesson students are to first use interactive spreadsheets on addition, subtraction, multiplication, and division to develop a theory on what the rules are for each one. They are then to practice what they believe to be true on a variety of online programs and tutorials, until they are certain that they can explain to someone else how to compute with integers. The culminating activity is to make a powerpoint presentation explaining what they have learned.
Subject: Math
Topic: Computing with integers
Grade Level: 7th grade
Student Lesson name and URL:ctap295.ctaponline.org/~wcarlson/student/
Standards
Addressed
Seventh Grade
Mathematics: Number Sense
1.0 Students know
...(how to) compute with, rational numbers expressed as...
1.2 Add, subtract, multiply, and divide integers2.0 Students use strategies, skills, and concepts in finding solutions:
2.4 Make and test conjectures...
Instructional
Objectives
Students should be solve problems in addition, subtraction, multiplication and division of integers.
Students should make and test conjectures as a strategy in finding the solution to problems using integers.
- Students shall use spreadsheets designed to add, subtract, multiply, and divide integers as a means of testing if their conjectures are correct when they utilize the spreadsheets to manipulate negative numbers with negative numbers, and negative numbers with positive numbers.
- Students shall practice their conjectures on a variety of internet activities. These should enable them to demonstrate their skill in finding solutions in a variety of integer problems.
- Students will be able to demonstrate an ability to add, subtract, multiply, and divide two negative integers and a positive and a negative integer correctly in 80% of their attempts on a written exam.
- Students will be able to demonstrate their understanding of the rule for adding two negative integers and a positive and a negative integer, in a powerpoint presentation explaining what the rule, receiving scores of accomplished or exemplary. (3 or 4)
Student Activities
Students shall use the following spreadsheets to test conjectures in developing rules for the addition, subtraction, multiplication, and division of integers. They are to develop rules in a variety of combinations using both positive and negative numbers.
click on link
click on link
click on link
Enabling
Activities
Students will use each
of the following internet activities to double-check their grasp of the
concepts of adding, subtracting, multiplying, and dividing of integers.
Tutorials are also available for those who still are having trouble.
Interactive Integer activities and help pages:http://www.mathwizz.com/integers/index.htm
Assessment
Pre-test
document file
Pre-Test
Answer file
Post-test
document file
Post-Test
Answer file
Rubric
for the culminating activity
Results
.
Pre-test data assessment
Post-test data assessment
Culminating activity data assessment
Web
Resources & Supplementary Materials
Introductory
Activity
Spreadsheet on
Addition: Excel Worksheet 1
Spreadsheet on
Subtraction: Excel Worksheet 2
Spreadsheet on
Multiplication: Excel Worksheet
3
Spreadsheet on
Division: Excel Worksheet 4
Enabling Activity
Interactive Integer activities and help pages: http://www.mathwizz.com/integers/index.htm
Culminating
Activity
Students will
deliver a presentation on powerpoint to display their understanding of
the rules for adding, subtracting, multiplying, and dividing integers.
They will also complete a written post-test.
School Location: Carmichael, California
Wendy Carlson: wcarlson@sanjuan.edu
Last Revised: 08/06/00