Activity
Math Is Fun

Math Is Fun: Metric Length

For Students 3rd - 5th Standards
The different units used to measure metric length are described, with comparisons to real world objects. A wonderful number line also shows the relative sizes of things all the way from a quark to the universe in powers of ten.
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Math Slice

Math Slice: Length

For Students 6th - 8th
This resource allows students to practice converting metric or customary units of length. Students are able to select parameters that include metric or customary units and difficulty level. There are ten problems with instant feedback...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.rp Track Practice

For Teachers 6th - 8th
Angel and Jayden were at track practice. The track is $\frac25$ kilometers around. Aligns with 7.RP.A.
Activity
Math Is Fun

Math Is Fun: Metric Speed (Velocity)

For Students 3rd - 8th
Simple definitions explain how speed and velocity are related. A brief list of examples will show you different speeds that you observe in real life situations.
Activity
Math Is Fun

Math Is Fun: Metric Area

For Students 4th - 6th
The relationships between metric units of area are explained, with examples of how to calculate area.
Activity
The Math League

The Math League: Length

For Students 9th - 10th
This site gives conversions from metric to metric as well as providing abbreviations for each.
Handout
Khan Academy

Khan Academy: Metric Units of Length Review

For Students 5th - 6th Standards
Metric units of length (millimeters, centimeters, meters, and kilometers) are reviewed and practice problems are provided.
Activity
TeachEngineering

Teach Engineering: How Big?

For Teachers 6th - 8th
Students teams determine the size of the caverns necessary to house the population of the state of Alabraska from the impending asteroid impact. They measure their classroom to determine area and volume, determine how many people the...
Activity
University of Waterloo (Canada)

University of Waterloo: Metric 4

For Students 3rd - 8th Standards
Test your knowledge at metric conversion by answering 30 questions on distance, length, volume, and weight.
Graphic
Math2

Math2.org: Weights and Measures

For Students 9th - 10th Standards
This resource provides information on weights and measures, including unit conversion tables.
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Khan Academy

Khan Academy: Estimating Length (Mm, Cm, M, Km)

For Students 3rd - 5th Standards
Practice estimating the length of real life objects using metric units. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Khan Academy

Khan Academy: Convert to Smaller Units (Mm, Cm, M, & Km)

For Students 3rd - 5th Standards
Practice converting a metric measure of length to a smaller unit. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.