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World Wide Metric Calculator
Do you need a quick conversion from metric units to imperial units or just the reverse? Use this resource for conversions of length, weight, pressure, and volume.
ClassFlow
Class Flow: Geometry Shapes
[Free Registration/Login Required] The teacher will use this lesson plan flipchart to measure length, area, volume, weight, temperature, and time.
PBS
Pbs Learning Media: Matter's Physical Properties: Interactive Lesson
In this interactive lesson, learn what the "physical properties" of matter are and how can they be measured and observed.
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Unit conversion.org: Online Unit Converter
Need a unit converter? Links to the most common converters provide access to the answers you need quickly.
Illustrative Mathematics
Illustrative Mathematics: G Mg How Many Leaves on a Tree? (Version 2)
In this task, learners must estimate the number of leaves on a large tree, taking into account various complex factors such as the area shaded by the tree, the area of irregularly shaped leaves, the uneven distribution of leaves, the...
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Allmath.com: Metric Converter
Use this converter to find equivalent units for a measure. You can convert measures for area, length, weight, temperature, and volume.
Science Education Resource Center at Carleton College
Serc: Air Is Matter
It's difficult at times for younger students to realize that air has mass. Matter is something that has volume (takes up space) and has mass (*can be weighed). Air does take up space, even if we can't see it, and air has weight, even if...
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Metric Conversion Calculator and Charts
Metric Conversions offers online calculators for making conversions, downloadable tables in many types of metric conversion (pdf format), and free conversion tools to put onto your website or dynamic pages.