# CONTACT CCSD21

Wheeling, Illinois 60090

Phone: 847-537-8270

Superintendent: Dr. Michael Connolly

# VISIT A SCHOOL

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

VIEW BOUNDARY MAP

### BECOME A MEMBER OF THE SCHOOL DISTRICT 21 TEAM

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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# Mathematics

## Operations and Algebraic Thinking

### Power Standards

• Solve one- and two-step addition and subtraction word problems using various representations (drawings, equations) within 100. (2.0A.1)

### Concepts and Skills

* Power Standard Content

• * Solve multi-digit addition and subtraction problems (including word problems) within 100
• Estimate sums and differences
• Describe numbers as odd or even
• Use repeated addition, arrays, and skip counting to model multiplication

### Language Usage

• A student in 2nd grade can demonstrate the ability to apply and comprehend critical concepts by verbally explaining strategies, documenting processes with equations, determining important information, citing from memory addition, subtraction facts up to 20, and identifying patterns.

### Content-Specific Vocabulary

• Sum
• Total
• Difference
• Plus
• Minus
• Even
• Odd
• Equation
• Number sentence
• Rule
• Pattern

• Subtract
• Solve
• Compare
• Calculate
• Estimate
• Classify

### Essential Understandings

• Events in everyday life require us to add and subtract with varying degrees of accuracy.
• Identifying the repetition in a pattern allows the pattern to be described by a rule.

### Factual Guiding Questions

• What real life situations require us to add and subtract?
• When do we need to add or subtract very accurately?
• When can we estimate the answer to an addition or subtraction problem?

### Conceptual Guiding Questions

• What is the relationship between addition and subtraction?
• What is the relationship between place value and accurate computation?
• Why is it important to add and subtract accurately? Fluently?
• Why is it important to be able to estimate sums and differences?

### Engaging/Debatable Guiding Questions

• Why is it important to develop computational fluency when technology tools can solve problems more quickly?