Unit Description
In this unit the
students will deal with data that describes realworld conditions and issues,
particularly environmental issues, and that data will often involve very
large numbers. Students will develop
benchmarks for making sense of large numbers in measurement. They will make sense of large numbers
through the trillions and will read and write large numbers using scientific
notations. Students will review
comparing and computing rational numbers.

Enduring Understandings
·
Understanding how to read, write and compare numbers in
various ways helps us make sense of our world.
·
Selection of standard measurement tools and units depends
on the real world situation.
· A personal awareness of
magnitude leads to a sense of measurement, the understanding that both units
and counts are essential for describing quantity.

Essential Questions
·
What is the role of measurement?
·
How can benchmarks be developed to help make measurements
readily accessible?
·
Why is accuracy handled in different ways in different
situations?
·
When can special rate methods be employed in situations
when ratios occur?

GLEs: 1, 2, 5, 7, 8, 9, 10, 11, 12, 13, 20, 21,
22, 23, 32, 40

Students will know…
·
Large numbers (developing benchmarks to better understand
the magnitude of large numbers).
·
Units (choosing measurement units to make sense for the
situation).
·
Comparing large numbers (using relative size of objects or
units to better make comparisons when large quantities of the objects or
units are reported.)
·
Estimation (developing estimation skills to better compare
situations involving large numbers).
·
Rounding (understanding reasons for rounding large numbers
and limitations of the information provided by large rounded numbers).
·
Calculations with large numbers (comparing and performing
computations with large numbers—e.g., finding differences and ratios for
comparison purposes—in informed ways so that more informed decisions can be made
on calculations with large numbers).
·
Population density (ratio comparing large populations in
large areas, e.g., number of people per square mile).

Students will be able
to…
·
Estimate with large numbers to provide reasonable
approximations of large quantities and a degree of accuracy appropriate to
the situation.
·
Compare large quantities (e.g., using differences, ratios,
rates), including consideration of how accurate a comparison needs to be for
a particular purpose.
·
Select and discuss appropriate operations and solve single
and multistep, reallife problems involving percents and decimals.
·
Use common reference points to compare and
order measurements within and between the U.S. and metric systems, and
degrees Fahrenheit and Celsius in reallife situations.
