# Dave Johnston

• ### Sandia Peak Tramway - Duration: 28 seconds.

• 1 month ago
• 22 views
Time-lapse film of the ride up to Sandia Peak in Albuquerque, New Mexico.
• ### 2016 0918 155430 010 hyperlapse 6x std - Duration: 11 seconds.

• 4 months ago
• 38 views
Nice piece of the bike trail near Padre Park that visits the San Antonio Missions
• ### They Flipped My Classroom! - Duration: 92 seconds.

• 3 years ago
• 757 views
An introduction to our flipped classroom.-- Created using PowToon -- Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free...
• ### Inequalities Part Two - Duration: 2 minutes, 8 seconds.

• 8 years ago
• 19,933 views
Solving inequalities using addition & subtraction.
• ### Inequalities Part One - Duration: 3 minutes, 44 seconds.

• 8 years ago
• 70,497 views
How to graph inequalities on a number line.
• ### Evaluating Expressions - Duration: 2 minutes, 37 seconds.

• 8 years ago
• 25,290 views
A quick tutorial in solving algebraic expressions. Substitute the assigned value for each variable, then solve the expression using the appropriate order of operations.
• ### Understand the Equal Sign - Duration: 3 minutes, 36 seconds.

• 8 years ago
• 5,379 views
What does the Equal Sign really tell us?
• ### Vocabulary Quadrant - Duration: 82 seconds.

• 8 years ago
• 433 views
An explanation of the term QUADRANT as it is used in mathematics. Includes visual explanation of the term and encourages students to create their own definition and picture.
• ### Rational and Irrational Numbers - Duration: 7 minutes, 24 seconds.

• 8 years ago
• 279,235 views
Animation that defines & compares rational and irrational numbers
• ### Introduction to Linear Correlation - Duration: 8 minutes, 9 seconds.

• 8 years ago
• 21,240 views
Animation to teach positive and negative correlations in data.
• ### Introduction to Perimeter - Duration: 6 minutes, 29 seconds.

• 8 years ago
• 3,445 views
Animation that explains perimeter and includes sample problems
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