999 West Dundee Road
Wheeling, Illinois 60090

Phone: 847-537-8270

Superintendent: Dr. Michael Connolly

School Board & Administration



CCSD21 is a school district comprised of 13 schools across 6 different communities in the northwest suburbs of Chicago.



School District 21 prides itself on its Professional Learning Community and its rich tradition of professional collaboration, high levels of professional development, and family-like atmosphere. If you see the opportunity to work with colleagues in making a difference in the lives of students and families in a truly diverse setting, School District 21 seeks your application.

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Measurement & Data

Critical Content

Power Standards

  • Estimate, measure and record lengths using appropriate labels (nearest inch, foot, cm and m). (2.MD.1,3)
  • Tell and write time using analog and digital clocks to the nearest 5 minutes, using AM and PM. (2.MD.7)
  • Solve word problems involving calculating, comparing and making exchanges between coins and bills using the $ and ยข symbols appropriately. (2.MD.8)
  • Draw, read and interpret picture graphs, bar graphs and line plots to represent data sets with up to four categories. (2.MD.9-10)


Concepts and Skills

* Power Standard Content

  • * Estimate, measure and record lengths
  • Describe how length measurements relate to the size of the unit chosen
  • Solve addition and subtraction word problems involving lengths given in the same unit
  • Represent whole numbers as lengths on a number line
  • * Tell and write time to the nearest 5 minutes using analog and digital clocks
  • * Solve word problems involving money
  • * Calculate and compare the value of coin and bill combinations
  • * Read and write money amounts in dollar and cents notation
  • * Create and interpret tally charts, tables, graphs, and line plots
  • Utilize graphs to ask and answer simple questions
  • Describe measurements of time (year, week, day) and temperature (Fahrenheit, Celsius)
  • Describe events using basic probability terms such as certain, likely, unlikely, impossible


Critical Language

Language Usage

  • A student in 2nd grade can demonstrate the ability to apply and comprehend critical language by describing the relationship between units of time and between units of length, asking and answering simple questions based on information found in graphs, explaining the meaning of probability, describing events using probability terms and explaining why a specific probability term was chosen to describe an event.


Content-Specific Vocabulary

  • Length
  • Inch
  • Foot
  • Yard
  • Millimeter
  • Centimeter
  • Meter
  • Coins (penny, nickel, dime, quarter)
  • Bills
  • Fahrenheit
  • Celsius
  • Symbols
  • Analog
  • Digital
  • Hours
  • Minutes
  • Seconds
  • Line
  • Plot
  • Bar graphs
  • Data


Process-Specific Vocabulary

  • Relationship
  • Tools
  • Notation
  • Standard unit
  • Intervals
  • Non-standard unit
  • Accuracy
  • Estimates probability
  • Draw conclusions
  • Create
  • Organize
  • Collect
  • Likely
  • Unlikely
  • Certain
  • Impossible

Concept-Based Connections

Essential Understandings

  • Objects found in everyday life can be measured using standard and non-standard units of measurement.
  • Data collections facilitate answering questions, making generalizations, and predicting.


Factual Guiding Questions

  • What do we measure?
  • Why do we measure?
  • How do we measure?
  • What are different standard units of measure?
  • What information can we get from a table? A tally chart? A graph?
  • What are ways we can describe a set of data?


Conceptual Guiding Questions

  • Why do we use standard units of measure?
  • How can you use data to make predictions?
  • Why do we organize data?


Engaging/Debatable Guiding Questions

  • What problems may arise if we didn’t have tools for measurement in the world?
  • When do we need to measure accurately?
  • How do you decide whether the answer should be an exact answer or an estimate?
  • Describe the relationship between probability and fairness.