Measurement and Data
Unit description: In this unit students will learn to recognize the need for standard units of measure (centimeter and inch) and apply this understanding to addition and subtraction problems involving length. The students will learn to recognize that the smaller the unit, the more iterations needed to cover a given length and they will learn to select appropriate tools to measure understanding that linear measure involves an iteration of units. The students will also learn to interpret and represent data in multiple ways, such as: line plot, bar graph, picture graph, and a tally chart.
Essential Outcomes of the Unit
Measurement and Data- Measure and estimate lengths in standard units.
2.MD.1 Measure the length of an object to the nearest whole by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.
Measurement and Data- Represent and interpret data.
2.MD.10 Draw a picture graph and a bar graph (with single-unit scale) to represent a data set with up to four categories. Solve simple put-together, take-apart, and compare problems using information presented in a picture graph or a bar graph.
Other Standards Addressed in the Unit
Measurement and Data- Measure and estimate lengths in standard units.
- 2.MD.2 Measure the length of an object twice, using different “length units” for the two measurements; describe how the two measurements relate to the size of the unit chosen.
- 2.MD.3 Estimate lengths using units of inches, feet, centimeters, and meters.
- 2.MD.4 Measure to determine how much longer one object is than another, expressing the length difference in terms of a standard “length unit.”
Measurement and Data- Relate addition and subtraction to length.
- 2.MD.5 Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units.
- 2.MD.6 Represent whole numbers as lengths from 0 on a number line with equally spaced points corresponding to the numbers 0, 1, 2, …, and represent whole-number sums and differences within 100 on a number line.
Measurement and Data- Represent and interpret data.
2.MD.9 Generate measurement data by measuring lengths of several objects to the nearest whole unit, or by making repeated measurements of the same object. Present the measurement data in a line plot, where the horizontal scale is marked off in whole-number units.
Essential Questions and Big Ideas
- Why do standards units matter?
- A standard unit of measure are the accepted, consistent increments we use to measure.
- A standard unit of measure for length are centimeters and meters and inches and feet.
- A nonstandard unit of measure is something that we use to measure, such as a paperclip or pencil, if we want to compare the measure of two things without using a standard unit.
- How do we choose appropriate tools and use them to measure the length of an object?
- Identify the appropriate tool to measure the length of various objects.
- Measure various objects to the closest whole number length with correct units.
- How do we use picture graphs and bar graphs to display and analyze data?
- Data collection is used to develop picture graphs and bar graphs with a single unit scale.
- Picture and bar graphs can be used to analyze and interpret data and to answer questions about a data set.
Download the complete Grade 2 Math Unit 5 framework to customize for your own planning.