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#3 “X” Marks The Spot

14 minutes 34 seconds

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4 number matrices; first 3 have numbers, the 4th is blank. Caption. To find a pattern in the first 3 Xs.

Provides two classroom activities for middle school math teachers to help students learn the skills needed to factor trinomials, a skill necessary for understanding algebra. The first activity, "X" Marks the Spot (or Diamond Problems), helps students practice addition and multiplication of integers and fractions. The second activity uses an area model for multiplication which provides students with a visual of the problem.

Media Details

Runtime: 14 minutes 34 seconds

Topic: Education, Mathematics
Subtopic: Mathematics, Teacher Training
Grade/Interest Level: PT/TT
Release Year: 2003
Producer/Distributor: Center For Distance & Online Learning L.A. Co. Office Of Ed
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Woman, standing and speaking to a classroom of children. Caption. It's also a key point when we're doing problem solving.

Woman speaks towards camera. Caption. Making the students decide, then explain their thinking.

Woman stands in front of a bulletin board, speaking to an audience off camera. Caption. I want to make sure you get that concept of equal.

Woman stands behind and instructs 2 teenage boys. Caption. The concept of functions by exploring patterns.

People in intersecting line formation on grass. Caption. Students move outside and then create a human graph.

Still image from: 10 Fat Turkeys

Person in a science lab. One beaker contains an orange liquid, and one beaker contains a green liquid. Caption: It's orange. That means its pH is 5.

Black and white image with words, "The sum of two opposite integers equals zero".

Black and white still frame of man in glasses looking down at phone with lips parted in mid-speech. Caption. From there, you'll know whether he has enough money.

Man in tan suit and glasses sits with arm out, hand resting on staff. His mouth is open as if speaking fervently. Caption. In algebra, we don't dilly dally or mess about.