Use tire size to predict size of vehicle
Dilates rectangle, nice intro to proportional sides and congruent angles
Activities and Explorations w/ Sketchpad or Geogebra - Proving similarity through dilations
Mathematics Vision Project (Secondary Mathematics - Module 6)
Helping kids understand the geometric mean:
youtube animation for geometric mean:
Possible Assessment or Group Exploration
...Right Triangles and Trigonometry
Introduction to the Pythagorean Theorem
This activity was great! Video was interesting...at first kids didn't see that Pythagorean theorem should be used to create two triangles. I deleted the width of the field from the worksheet and we googled to find out. Also, I deleted the text at the top that said Bailey ran about 100 yards because some kids used that as their estimate.
The thing that surprised me most was how annoyed the kids were because they couldn't get the "real answer". I told them it was whatever they figured out with their assumptions and estimates. "But couldn't someone go on the field and measure?" a student asked. I explained that the only way to determine the exact locations of the players were from the picture...that's all we had to go on. Nice activity and i would do it again.
Activities and Explorations
Explore parallelogram properties using sketchpad. Open on iPad.
Possible Assessments or Group Explorations
Area of Polygons - using Trig
Read more about this lesson on my blog - Teaching the Unit, not the Chapter
Caution when applying to real world tasks
Writing Variable Expressions
Writing Variable Expressions: Link for teacher to create class
Teaching Linear Inequalities
Worked wonderfully...kids were super excited. We plotted on large first quadrant grids. Then I extended the lesson by bringing in supermarket advertisements and having kids choose two products, then find out how many they could buy for a given amount of money.
Segued fairly nicely into systems of linear inequalities as I told kids they could buy "no more than" a certain number of product, etc.
Intro to Scientific Notation
Domain and Range
Desmos Online Graphing Calculator
Use to "show" rather than "tell"
Click here for my own lessons on Domain and Range
Examples of real world mistakes in math
Movie Clips for all mathhttp://www.math.harvard.edu/~knill/mathmovies/
Solving Systems of Equations
Puzzle for Solving Systems of Unknowns - Can create additional puzzles.
Why do we factor equations?
How Parabolic Flight Works
Video of person on zero-g flight
Lessons for Practical Money Skills - from VISA (includes buying a car, budgeting, etc.)
Capture/Recaputure - Ratio and Proportions
Counting embedded figures - prepares for geometry overlapping figures
Hidden Pictures - Prepares students for complicated figures in Geometry
Print out or use online
Print out or use online