# Measuring Length with Informal Units Unit Plan

5 x Lessons

This Mathematics unit addresses the concept of measuring, comparing and ordering length 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.

## Lessons

### Measuring with Dinosaur Footprints

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A 60 minute lesson in which students will measure and compare lengths of objects using informal units.

### Measuring and Comparing Length

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A 60 minute lesson in which students will measure and compare lengths of objects using informal units.

### Measuring, Comparing and Ordering Height

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A 60 minute lesson in which students will measure, compare and order height using informal units.

### Length Investigation - The Longest Finger

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

### Revision of Length

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A 60 minute lesson in which students will revise and consolidate the concept of length.

### Assessment - Measuring Length with Informal Units

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

#### Common Core State Standards alignment

Grade 1 > Standards for Mathematical Practice > Measurement & Data > Measure lengths indirectly and by iterating length units > CCSS.MATH.CONTENT.1.MD.A.1
Order three objects by length; compare the lengths of two objects indirectly by using a third object.

Grade 1 > Standards for Mathematical Practice > Measurement & Data > Measure lengths indirectly and by iterating length units > CCSS.MATH.CONTENT.1.MD.A.2
Express the length of an object as a whole number of length units, by laying multiple copies of a shorter object (the length unit) end to end; understand that the length measurement of an object is the number of same-size length units that span it with no gaps or overlaps. Limit to contexts where the object being measured is spanned by a whole number of length units with no gaps or overlaps.

Grade 2 > Standards for Mathematical Practice > Measurement & Data > Measure and estimate lengths in standard units > CCSS.MATH.CONTENT.2.MD.A.2
Measure the length of an object twice, using length units of different lengths for the two measurements; describe how the two measurements relate to the size of the unit chosen.