Illuminations: Scuba Diving in Belize

# Scuba Diving in Belize

## Ready to Take the Plunge!

 Students will work in pairs on various measurement problems. They will complete linear conversions, find elapsed time, calculate a percentage, and analyze data from a chart.

### Learning Objectives

 Students will: Calculate elapsed time Calculate percentages Read and interpret tables and charts Solve measurement problems

### Materials

 Computer with internet connection Calculators Yardsticks and rulers Bathroom scale Ready to Take the Plunge! Activity Sheet Dive Data Activity Sheet

### Assessment Options

 Work one-on-one with students while they are completing the first activity sheet, Ready to Take the Plunge. Are they calculating elapsed time effectively? Are they working with more ease than in the previous lessons? Observe students as they work in pairs. Are they verbalizing their ideas to their partner? Are they listening to each other's strategies?

### Extensions

 Create a brochure about scuba diving in Belize or about saving the Barrier Reef. Create a double bar graph or two circle graphs to compare the data collected on the dives (last year's and this year's data). As a creative closing to the unit, have students write an ending for the trip. Have them share their stories with the class.

### Teacher Reflection

 Were students able to calculate elapsed time more easily than in previous lessons? If not, what seemed to be the most challenging part for the students? Did this lesson hold students' enthusiasm? Were any concepts presented too abstractly? If so, what adjustments were made while teaching this lesson? Are students becoming more independent as they work through the activities in this series of lessons? If not, what do they need to progress on their own?

### NCTM Standards and Expectations

 Data Analysis & Probability 3-5Propose and justify conclusions and predictions that are based on data and design studies to further investigate the conclusions or predictions. Describe events as likely or unlikely and discuss the degree of likelihood using such words as certain, equally likely, and impossible. Measurement 3-5Understand such attributes as length, area, weight, volume, and size of angle and select the appropriate type of unit for measuring each attribute. Understand that measurements are approximations and how differences in units affect precision. Understand the need for measuring with standard units and become familiar with standard units in the customary and metric systems. Select and use benchmarks to estimate measurements. Select and apply appropriate standard units and tools to measure length, area, volume, weight, time, temperature, and the size of angles.
 This lesson was prepared by Tamie Dickson.

2 periods

### NCTM Resources

Children Are Mathematical Problem Solvers

 More and Better Mathematics for All Students
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