i

**How many Dots used****How many Toothpicks used****Type of bridge design chosen**

See Documentation Page for more details

Step back and take a look at your design...

Look around the room at the design of others...

in your

**Did my group's bridge do as well as I expected?****Why or Why not?****If not, what could we have done to make the bridge stronger?****Could more collaboration have produced a better bridge?****Could comparing all group ideas result in a "best built" bridge?****How did my bridge's efficiency compare with others in the group?****Was the overall winner the most efficient?****If not what might this mean to you as a builder? As a client?**

Calculate toothpicks as percent of total materials

Calculate dots as percent of total materials.

Calculate percent increase or decrease in toothpicks between initial

design and final design.

Calculate percent increase or decrease in dots between initial

design and final design.

2. Would it be better if this number were larger or smaller? Why?

3. What future steps could you take to get this percentage to be better?

Create a graph using your number of weights as the dependant variable, and the number of toothpicks as your independent variable, and plot your

Examine the equations and graphs for all teams in a gallery walk and return to your team group to discuss what changes, and what remains constant when comparing all of the graphs. Discuss why. Do these graphs have any real value as an analytical tool? Why or why not? Share out your team’s thoughts during a class discussion after writing your answers and rationale.

Create a graph using your average weight held per structural member as a slope (m), and plot a series of points starting from the origin using this slope. Connect a line from these points to the origin and create an equation for this line.

Examine the equations and graphs for all teams in a gallery walk and return to your team group to discuss what changes, and what remains constant when comparing all of the graphs. Discuss why. Do these graphs have any real value as an analytical tool? Why or why not? Share out your team’s thoughts during a class discussion after writing your answers and rationale.

2. Is there a pattern you might recognize? If so what might it mean?

3. Is there a pattern when you compare all of the various team’s graphs

4. Is there a pattern you might recognize? If so what might it mean?

Find the overall range for all of the team’s outputs (number of toothpicks used) and a region of domain for all of the inputs (average weight per structural member) to create a set of axis for a class wide graph.

Create a graph using average weight per structural member as the dependant variable, and the number of toothpicks as your independent variable, and plot your

2. How does your point look with respect to the rest of the scatter plot?

3. Who had the lowest average point in the group?

4. Who had the highest average point in the group?

5. Who had the lowest number of toothpicks in the group?

6. Who had the highest number of toothpicks in the group?

7. Did bridge performance relate directly to how many, or few,

8. Which of these two possibilities is better for your company?

9. Can you draw a “best fit” trend line through the scatter plot?

10. Make an equation for the trend line.

Looking at this whole group graph draw a box bounded horizontally by the highest and lowest output values, and vertically by the highest and lowest input variables. Now connect the lower left corner to the upper left corner of the box you just made. Create an equation for this line suing point slope form as a starting point

2. Does this new line have any meaning to us analytically? Why or why not?

3. Does seeing this line make you rethink your “best fit” trend

4. Can companies use data like this for future design decisions?

Click the picture below...

Watch the entire movie...

Discuss your thoughts on why this happened

Now lets look at the virtual bridge building software on our computers...**West Point Bridge Builder**

- Create a truss bridge over the
**default**span - After you have achieved a stable design...load test
- Once failure has been avoided...check forces in
members**ALL** - Reduce member sizes wherever possible
*(retest as necessary)* - Minimize cost of bridge until failure is barely avoided
- Save your design and EnGrade file to Mr. Taylor
**Lowest Cost Functional Bridge Wins Bid and Contract!!!**

...Engage in whole class discussion and reflection about relative performance and design merits.

Next compare the two designs costs and discuss which style bridge was a better value for the money in a whole class activity.

A gallery walk of each groups various Artifacts followed by a group discussion about the various approaches and diversity. After reflection and group analysis, construct a final presentation documenting your process and what new things you have learned about Geometry and Excel Spreadsheets for your class and teacher. Your presentation artifact shall be a PowerPoint presentation of no less that 5 slides and no more than 15. Your presentation should address all factors considered and how looking at the other groups work may have affected your final analysis.

All PowerPoint presentations should be of professional and conservative business or scientific format. These shall then be posted on an ongoing web based class project site and each persons personal web portfolio for display on the internet. All pages and portfolios shall conform to internet safety standards and acceptable language and content policies.

A formal peer review shall be done as a discussion post on the class webpage and shall be completed appropriate to said venue with regard to commentary, language and content. This review/reflection is to be a graded activity of self and peer assessment skills.

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