 ## Computation and Estimation Overview
Students will plan an imaginary two- to three-day trip to Cuyahoga Valley National Park. They will determine who is going with them and where they want to go. They will then compute the cost of the trip and chart the trip on a map. Standards Addressed
Grade 6, Mathematics — Number Sense

05-07 Benchmark
I. Use a variety of strategies, including proportional reasoning, to estimate, compute, solve and explain solutions to problems involving integers, fractions, decimals and percents.

Y2003.CMA.S01.G05-07.BI.L06.I14 / Computation and Estimation

14. Use proportional reasoning, ratios and percents to represent problem situations and determine the reasonableness of solutions.

Grade 7, Mathematics — Number Sense

05-07 Benchmark
I. Use a variety of strategies, including proportional reasoning, to estimate, compute, solve and explain solutions to problems involving integers, fractions, decimals and percents.

Y2003.CMA.S01.G05-07.BI.L07.I09 / Computation and Estimation

09. Represent and solve problem situations that can be modeled by and solved using concepts of absolute value, exponents and square roots (for perfect squares).

05-07 Benchmark
C. Identify appropriate tools and apply appropriate techniques for measuring angles, perimeter or circumference and area of triangles, quadrilaterals, circles and composite shapes, and surface area and volume of prisms and cylinders.

Y2003.CMA.S02.G05-07.BC.L06.I03 / Use Measurement Techniques and Tools

03. Estimate perimeter or circumference and area for circles, triangles and quadrilaterals, and surface area and volume for prisms and cylinders by estimating lengths using string or links, areas using tiles or grid, and volumes using cubes.

05-07 Benchmark
E. Use problem solving techniques and technology as needed to solve problems involving length, weight, perimeter, area, volume, time and temperature.

Y2003.CMA.S02.G05-07.BE.L07.I04 / Use Measurement Techniques and Tools

04. Solve problems involving proportional relationships and scale factors; e.g., scale models that require unit conversions within the same measurement system.

08-10 Benchmark
E. Estimate and compute various attributes, including length, angle measure, area, surface area and volume, to a specified level of precision.

Y2003.CMA.S02.G08-10.BE.L08.I03 / Use Measurement Techniques and Tools

03. Use appropriate levels of precision when calculating with measurements. Materials
Computer with Internet connection

Calculators Procedure
Pictures of park visitation are available at www.generationscvnp.org/photos.aspx.

1. Distribute the student handout A Trip to the Park and review it with the class. With younger students, you may want to do one section at a time and explain it as they are ready to do each part.
2. Depending on your preference, students could work with a partner.
3. Things you may need to review:
1. The Places to Go Web page, as students need to look up costs of different activities at the park.
2. How to find the cost for meals using the Places to Go Web page or fast food restaurants’ Web sites.
3. Using proportion to figure out a cost for more than one person.
4. Using the scale on a map to determine the actual length of their trip. (These will not be accurate but should be a good estimate of their travel.) Evaluation
The student handout states that the students must convince their parents that their trip is worthwhile. After they have completed all parts of the worksheet, they should write a paragraph to convince their parents that they made wise choices.

Paragraph Evaluation Rubric          