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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Physical Science

Power Standards
  • Analyze data obtained from testing different materials to determine which materials have the properties that are best suited for an intended purpose. (2-PS1-2)
  • Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot. (2-PS1-4)

Critical Content

Content and Skills

*Power Standard Content

PS1.A: Structure and Properties of Matter

  • Different kinds of matter exist and many of them can be either solid or liquid, depending on temperature. Matter can be described and classified by its observable properties. (2-PS1-1)
  • * Different properties are suited to different purposes. (2-PS1-2), (2-PS1-3)
  • A great variety of objects can be built from a small set of pieces. (2-PS1-3)
  • * Every human-made product is designed by applying some knowledge of the natural world and is build using materials derived from the natural world.

PS1.B: Chemical Reactions

  • * Heating or cooling a substance may cause changes that can be observed. Sometimes these changes are reversible, and sometimes they are not. (2-PS1-4)

Critical Language (Science & Engineering Practices)

Language Usage

  • A student in second grade can demonstrate the ability to construct an argument with evidence to support a claim. (2-PS1-4)


Content-Specific Vocabulary

  • Materials                  
  • Properties
  • Data
  • Object
  • Heating
  • Cooling
  • Evidence
  • Matter
  • Substance
  • Natural world
  • Reversed
  • Solid
  • Liquid
  • Temperature


Process-Specific Vocabulary

  • Analyze
  • Construct
  • Classify
  • Observe
  • Cause and effect


Concept-Based Connections

Essential Understandings

  • Matter exists in different states.
  • Substances can be changed and sometimes those changes can be reversed.


Factual Guiding Questions

  • What is matter?
  • What is the world made of?
  • What are the different states of matter?
  • What are properties of matter?
  • What causes substances to change from one state to another?
  • Can substance changes be reversed?


Conceptual Guiding Questions

  • Why does matter exist in different states?
  • Why do changes in matter occur?
  • What happens when we change the properties of matter?
  • Why can some substances be changed and some not be changed?


Engaging/Debatable Questions

  • Why is it beneficial for matter to be able to change states?