# Find a Resource

## Measurement and Trees

### Lesson Overview:

Students will gain an understanding of the different ways of measuring the height of a tree in their school yard, backyard or excursion.  Measurements taken for professional purposes in forestry will be explored to ground these methods in a real world context. They will compare and contrast various methods to measure items in their classrooms, discuss results and infer appropriate measuring instruments for accuracy.  Students will then undertake field work outdoors to compare four methods of estimating the height of a tree, and finally explore the mathematical basis behind these approaches and why they work.

The YouTube clip "How to measure a tree" provides a multimedia exploration of two of these methods.

4, 5, 6, 7

Mathematics

### Strand Content Description:

#### Mathematics

• ACMMG061 - Measure, order and compare objects using familiar metric units of length
• ACMMG064 - Identify angles as measures of turn and compare angle sizes in everyday situations
• ACMMG084 - Use scaled instruments to measure and compare lengths, masses, capacities and temperature.
• ACMMG089 - Compare angles and classify them as equal to, greater than, or less than, a right angle
• ACMMG108 - Choose appropriate units of measurement for length, area, volume, capacity and mass.
• ACMMG112 - Estimate, measure and compare angles using degrees. Construct angles using a protractor
• ACMMG135 - Connect decimal representations to the metric system
• ACMMG136 - Convert between common metric units of length
• ACMMG137 - Solve problems involving the comparison of lengths using appropriate units
• ACMMG165 - Classify triangles according to their side and angle properties
• ACMMG166 - Demonstrate that the angle sum of a triangle is 180°
• ACMNA100 - Solve problems involving multiplication of large numbers by one- or two-digit numbers using efficient mental, written strategies and appropriate digital technologies
• ACMNA101 - Solve problems involving division by a one digit number, including those that result in a remainder
• ACMNA104 - Recognise that the place value system can be extended beyond hundredths
• ACMNA128 -  Add and subtract decimals, with and without digital technologies, and use estimation and rounding to check the reasonableness of answers
• ACMNA129 - Multiply decimals by whole numbers and perform divisions by non-zero whole numbers where the results are terminating decimals, with and without digital technologies
• ACMNA134 - Explore the use of brackets and order of operations to write number sentences
• ACMNA154 - Multiply and divide fractions and decimals using efficient written strategies and digital technologies
• ACMNA156 - Round decimals to a specified number of decimal places
• ACMNA173 - Recognise and solve problems involving simple ratios
• ACMNA175 - Introduce the concept of variables as a way of representing numbers using letters
• ACMNA291 - Use efficient mental and written strategies and apply appropriate digital technologies to solve problems

Sustainability

### Resource Type/s:

Primary: Activity

Secondary: Student Worksheet ## Student Resource

### Teacher Resource - Measurement and Trees

A teachers guide to the activity "Measurement and Trees" including curriculum links, activity outlines and suggested answers.

File Size: 155.31 kb
File Type: PDF

## Student Resource

### Student Workbook - Measurement and Trees

This printable student workbook is designed to help students record their data from the various activities involved in the Measurement and Trees resource. It includes space to fill in recorded data and answer questions.

File Size: 252.40 kb
File Type: PDF