# Measuring Mass with Informal Units Unit Plan

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5 x Lessons |1 x Assessment | Suitable for Grades: Pre-K - K

This mathematics unit addresses the concept of measuring, comparing, and ordering mass using informal units.

It consists of 5 lessons of approximately 60 minutes duration.

The sequence of lessons and suggested time frames should be regarded as a guide only; teachers should pace lessons in accordance with the individual learning needs of their class.

An assessment task for monitoring student understanding of the unit objectives is included and will require an additional lesson.

### Overview

#### Objectives

• To explore the concept of mass by comparing and ordering objects.
• To create a set of balance scales for measuring and comparing the masses of objects.
• To develop the concept of mass by comparing and ordering the masses of objects.
• To apply knowledge and understanding of mass to a real-world context.
• To review the concept of mass.

#### Preparing for Learning

Prior to starting the unit, create a measurement display in your classroom. Display teaching resources in the classroom that will stimulate the students’ interest and assist in their learning. For examples of teaching resources to display in your classroom, browse the Mass collection on the Teach Starter website.

Some of the resources that accompany this unit plan will need to be prepared prior to teaching. For this reason, it is advised that teachers browse through all lessons before starting the unit.

### Lessons

#### Introduction to Mass

A 60-minute lesson in which students will explore the concept of mass by comparing and ordering objects.

#### Using Balance Scales

A 60-minute lesson in which students will create a set of balance scales for measuring and comparing the masses of objects.

#### Comparing and Ordering Mass

A 60-minute lesson in which students will develop the concept of mass by comparing and ordering the masses of objects.

#### Mass Investigation - How Heavy Are the Objects in Your Classroom?

A 60-minute lesson in which students will apply knowledge and understanding of mass to a real-world context.

#### Review of Mass

A 60-minute lesson in which students will review the concept of mass.

#### Assessment - Measuring Mass with Informal Units

A 30 minute assessment in which students will demonstrate their knowledge and understanding of mass.

#### Common Core Curriculum alignment

• CCSS.MATH.CONTENT.K.MD.A.1

Describe measurable attributes of objects, such as length or weight. Describe several measurable attributes of a single object.

• CCSS.MATH.CONTENT.K.MD.A.2

Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference. For example, directly compare the heights of two children and describe one child as taller/sho...