Intermath | Workshop Support
 Lesson Plan

Title

Divisibility Rules

Topic

What are the divisibility rules for 2, 3, 4, 5, 6, 9, and 10?

Develop technology skills and computer literacy through the use of the spreadsheet program Excel.

Introduction/Practice/Exploration

Students will explore Excel and discover rules of divisibility for  the numbers 2, 3, 4, 5, 6, 9, and 10.  First, students will examine multiples of 2 using pencil and paper.  Then students will learn to create a chart in Excel that will allow them to more easily see patterns of numbers and determine rules of divisibility for the numbers listed above.

Lesson type (lab, demo, worksheet, hands-on, other)

Demo, lab

Materials and Equipment

Pencil Paper

White board, chalkboard, dry erase board (any)

Computer with Excel

QCC Standards:

Mathematics

Number Sense & Numeration; Fractions & Decimals

Topic: Factor, Prime, Multiple, GCF, LCM
Standard: Identifies and applies divisibility, factors, prime factors, greatest common factor, and least common multiple.

Number Sense & Numeration; Fractions & Decimals

Topic: Factor, Multiple, Prime, Composite
Standard: Identifies factors multiples, primes and composites.

Procedures/Activities

• Students will recreate a chart provided by instructor that identifies the multiples of a given number, 2.

• Put the number 2 in the first column. Have students list ten multiples of the number 2. These can include 4, 6, 8, 10, 12, 14, 16, etc. After the students have listed the multiples on their paper, have them help you fill in the multiples column on your chart.

• Discuss the observations found concerning the multiples of 2. Use these observations to develop a divisibility rule for 2, example:  all numbers divisible by 2 are even.

• Use Excel to create the same chart that was created by pencil and paper.  Explain and demonstrate the formula necessary to demonstrate the multiples of 2.  Click here to view sample spreadsheet.

• Repeat steps above with the numbers 3, 4, 5, 6, 9, and 10.

Total Duration

Two fifty minute class periods

Technology Connection

Students will use Excel to create a spreadsheet that demonstrates the patterns associated with the divisibility of  2, 3, 4, 5, 6, 9, and 10?