- Extend their understanding of the process of measurement
- Select appropriate units and tools to measure to the degree of accuracy required in a particular situation
- Understand the structure and use of systems of measurement
- Develop the concepts of rates and other derived and indirect measurements
- Make and use measurements in problems and everyday situations

*Benchmarks* 9A (The Mathematical World: Numbers)

Grades 3-5, page 212

Measurements are always likely to give slightly different numbers,
even if what is being measured stays the same.

*Benchmarks* 3A (The Nature of Technology: Technology and Science)

Grades 3-5, page 45

Measuring instruments can be used to gather accurate information for
making scientific comparisons of objects and events and for designing and
constructing things that will work properly.

*Benchmarks* 1B (The Nature of Science: Scientific Inquiry)

Grades K-2, page 10

Tools such as thermometers, magnifiers, rulers, or balances often give
more information about things than can be obtained by just observing things
without their help.

*Benchmarks* 9A (The Mathematical World: Numbers)

Grades 3-5, page 212

When people care about what is being counted or measured, it is important
for them to say what the units are (three degrees Fahrenheit is different
from three centimeters, three miles from three miles per hour).

*Benchmarks* 12B (Habits of Mind: Computation and Estimation)

Grades 3-5, page 290

Judge whether measurements and computations of quantities such as length,
area, volume, weight, or time are reasonable in a familiar context by comparing
them to typical values.

*Benchmarks* 11D (Common Themes: Scale)

Grades 6-8, page 278

Properties of systems that depend on volume, such as capacity and weight,
change out of proportion to properties that depend on area, such as strength
or surface processes.

*Benchmarks* 9B (The Mathematical World: Symbolic Relationships)

Grades 6-8, page 219

Mathematical statements can be used to describe how one quantity changes
when another changes. Rates of change can be computed from magnitudes and
vice versa..

*Benchmarks* 12B (Habits of Mind: Computation and Estimation)

Grades 6-8, page 291

Determine what unit (such as seconds, square inches, or dollars per
tankful) an answer should be expressed in from the units of the inputs,
and be able to convert compound units (such as yen per dollar into dollar
per yen, or miles per hour into feet per second).

*Benchmarks* 12C (Habits of Mind: Manipulation and Observation)

Grades 3-5, page 293

Measure and mix dry and liquid materials (in the kitchen, garage, or
laboratory) in prescribed amounts, exercising reasonable safety.