Introduction

I use Web Quest to design a lesson on Probability, because the book did a poor job of teaching it and presenting it.  After several years of trying different formats for my lesson, I found that separating it into 3 types of problems worked well for me.  This product enables me to use technology to help teach it.  If you don't have this software you could just have them use pencil and paper to design the problems.

Learners

This lesson is for a high school Geometry class that addresses mainly freshman.  Topics covered up till now are basic terms and concepts, pythagorean theorem, special triangles, finding the area of polygons both regular and irregular.  In fact this is one of the last things I teach.

Curriculum Standards

This is a very good lesson to use near the end of the semester, because with slight changes you can review lots of curriculum objectives.

Process

See student page.
 

The hardest part for me is controlling the carousel, because students work at different speeds.  You can let them rotate themselves or you can blow a whistle.  If you don't want to hang the problems up, you can pass the problems around.  You don't want them looking up the answers so you may want the solutions somewhere other than the back.  There are lots of changes you can make to adapt this lesson to your students.

Later I intend to go back and include some different and more problems, for example concentric circles and hitting different parts other than the bull's eye.  I also will add the symbol A, (except it doesn't have a line through it) which means "and".
 
 

Resources Needed

You will need either Geometer's Sketchpad or a similar program.

Evaluation

I always know when my students really did learn the lesson, because in a week's time they can do the problems.  I keep going back to problems as often as I can.  On tests I include a review section to cover previous chapters.

Conclusion

This lesson should be exciting, because it lets the students learn new information then apply it.  I have offered extra credit if a student what to build the dartboard out of real materials.

Credits & References

Thanks to all the people who created the sites and provided the material I used.