In 3rd grade, students measured objects to the nearest half and quarter of an inch and displayed that data on a line plot. In standard MAFS.4.MD.2.4, 4th graders extend that learning to include displaying measurements to nearest half, quarter, and eighth of a unit on a line plot. They must also solve problems involving addition and subtraction of the fractions to interpret data from a line plot.

4th graders are required to synthesize a lot of prior learning: creating and interpreting line plots, measuring to nearest fraction of a unit, displaying fractional amounts on a number line/ordering fractions, and addition and subtraction of fractions (*note that our FSA Item Specifications state that addition and subtraction are limited to like denominators*). Students may need support with any one of these concepts; the resources below can be used to access their prior knowledge or to scaffold instruction.

“Magnify an Inch” – blog post with instructional ideas for teaching students about fractional parts of an inch; can easily be extended to include eighths

“Measuring Length with Fractions” – blog post with lesson ideas for measuring objects to the nearest half and quarter of an inch; can also easily be extended to include eighths

LearnZillion Lesson: “Measure and Represent Objects to the Nearest Whole, Half, and Quarter Inch Using a Ruler and Line Plot” – lesson ideas to access students’ prior knowledge about measuring to nearest faction of a unit, and displaying and interpreting measurement data on a line plot

LearnZillion Video- “Identify Equivalent Fractions on a Number Line” – video that can be used to reteach representing fractions on a number line, as well as using a number line to find equivalent fractions; students may need reteach on these skills in order to create the horizontal axis of their line plot to display measurement data to the nearest fraction of a unit

LearnZillion Video: “Add and Subtract Fractions with Like Denominators” – video to revisit why only the numerators are added or subtracted when adding or subtracting with like denominators