For a complete lesson on prime factors, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that a factor of a number divides into the number without a remainder. For example, 7 is a factor of 14, because 7 divides into 14 without a remainder. To find the factors of a number, such as 8, first divide 8 by 1, which equals 8. Since there is no remainder, both 1 and 8 are factors of 8. Next, divide 8 by 2, which equals 4. Since there is no remainder, both 2 and 4 are factors of 8. Next, divide 8 by 3. Since 8 is not divisible by 3, then 3 is not a factor of 8. Next, divide 8 by 4, which equals 2. Since there is no remainder, both 4 and 2 are factors of 8. Notice, however, that 4 and 2 are repeat factors (we already know that 4 and 2 are factors of 8). This means that all other factors will also be repeat factors, so there is no need to continue -- the factors of 8 are 1, 2, 4, and 8. Note that a number that has more than two factors, such as 8, is called a composite number, and a number that has only two factors (itself and 1), such as 5, is called a prime number.

Tagged under: prime,factor,factors,composite,math

Clip makes it super easy to turn any public video into a formative assessment activity in your classroom.

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Make YouTube one of your teaching aids - Works perfectly with lesson micro-teaching plans

1. Students enter a simple code

2. You play the video

3. The students comment

4. You review and reflect

* Whiteboard required for teacher-paced activities

With four apps, each designed around existing classroom activities, Spiral gives you the power to do formative assessment with anything you teach.

Quickfire

Carry out a quickfire formative assessment to see what the whole class is thinking

Discuss

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Team Up

Student teams can create and share collaborative presentations from linked devices

Clip

Turn any public video into a live chat with questions and quizzes

Tried out the canvas response option on @SpiralEducation & it's so awesome! Add text or drawings AND annotate an image! #R10tech

Using @SpiralEducation in class for math review. Student approved! Thumbs up! Thanks.

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Dr Ayla Göl
@iladylayla

A good tool for supporting active #learning.

The Team Up app is unlike anything I have ever seen. You left NOTHING out! So impressed!