2. Goal: To explore conversions between the metric and English system using online tools, hands-on measurements, and computation and be able to express the mathematical ideas behind measurements and conversions.

3. You have been hired at the exciting Billy Bonker’s Chocolate Factory! You are the expert in measurement! You are going to help Billy Bonker open a Canadian factory When it comes to chocolate bars…what are different things we could measure?

4. Measurement Systems In the U.S. we use the English system for measurement. Can you give an example of some units of measurement that we use in the English system?

5. Measurement Systems In Canada and some other parts of the world, the Metric system is used. Can you name any common units in the Metric system?

6. Conversions To go from one measurement system to another we need conversions. Here is a link we can use to convert between the English and Metric system: Online Conversion Help Let’s check it out…

7. Online Conversion Exercise Use the conversion tool on the web to find the following: 1.) 1 inch = ___2.54___ centimeters 2.) 1 meter = __25.4____ millimeters 3.) 1 meter = ___100___ centimeters 4.) 1 centimeter =__10___ millimeters 5.) 1 mile = ___5280___ feet 6.) 1 kilometer = ___ 0.621369949 ___ miles 7. ) 1 foot = ___12___ inches

8. Thought experiments Which of the above are equivalent relationships within the Metric system and why? Which of the above are equivalent relationships within the English system and why? Which of the above convert between the English system and the Metric system and why?

9. Use a ruler to measure your candy bar in inches and partial inches (1/2, 1/4, 1/8 inches) and fill in the information below. Candy Bar_____S’mores_______________ Length __3 3/4___in____ Width ___1 1/16___in____ Height ___11/16__in__

10. Compare! Find the other people in the class with the same candy bar. How do your measurements compare? Write a brief paragraph below to explain.

11. Billy Bonkers wants Metric measurements! Talk to the other people in your group about how you can convert the candy bar dimensions to the Metric system. Go ahead and make the conversions and explain what you did. Does your answer make sense? Why or why not?

12. Other Measurements? Look at your candy bar…what other measurements do you see?