Week 2

Divisibility Rules
Hi, kids. By the end of this e-tivity, you will be able to:

1. find out if a number is divisible by 2,3,5,6,7,8, & 9
2. solve problems involving the concept of divisibility
3. properly use the words divisible by, dividend, quotient, divisor, & remainder, &
4. explain whether a number can be evenly divided by another

Average online time: 2 hours

Average offline time: 2 hours

Suggested schedule: click here

Step 1. How good are you at dividing?
Let's take this interactive test that examines your ability to divide whole numbers when the result is less than 99.
Your mission is to have a score greater than 35!

Step 2. Learning key Vocabulary
Did you know that when we divide each number gets a special name?
Let's learn about these special names!

Image retrieved from http://www.mathwizz.com/arithmetic/help/help9.htm



Dear student, keep in mind that when the remainder is zero (0), we say that the divisor evenly divides the dividend.




Practicing these key words

■ Let's solve an interactive crossword.

■ Edit the following mind-map by clicking on the image and add your own example. You need to use our four special words.

username: quinto      password: divisor

Step 3. Finding out about divisibility rules.

Wouldn't it be amazing if we just look up at a number and determine if this number can be evenly divided by 2, 3, 4, or 5? Well divisibilty rules help us figure it out! 

As you listen to this video, complete the following table.

Video retrieved from http://www.youtube.com/watch?v=UZYpOKtylxM

Check out if your table is correctly done by comparing it to Mr. Reyes' poster.


 Step 4. Extended Practice.
The only way to become a master at divisibility rules is by practicing a lot. The following websites provide you with extra-practice on the topic. Click on the image to have access to fun games!

Step 5. Assessing Understanding



Choose between any of these two assignments:

■ Creating a Voki (a speaking avatar) who is broadcasting a radio program called "Divisibility Rules". You need to explain at least five rules and provide clear examples.


■ Creating a power point presentation addressed to a fourth grade student who is eager to know about divisibility rules. You need to explain at least five rules and provide clear examples.

Once you have finished it, send it to abogoya@rochester.edu.co. If you have any question, please leave a comment at the end of this entry. I'll be happy to help you out!