Created 6/14/20. Updates available 
online.
 
  
    
    
  
    
      
    
    Border Problem - Intro to Algebraic Expressions
      
    
    
    
     
    
    
    
    
    
      
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          Title
         | 
        Border Problem - Intro to Algebraic Expressions | 
      
      
        
          | 
            Description
           | 
          Students will look at the growth of a square's border using the area builder sim of PhET.  From there, they will look at patterns formed by the tile's border and generalize the patterns for larger squares using variables. | 
        
      
      
        
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            Subject
           | 
          Mathematics | 
        
      
      
        
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            Level
           | 
          High School, Middle School | 
        
      
      
        
          | 
            Type
           | 
          Discussion Prompts, Guided Activity | 
        
      
      
        
          | 
            Duration
           | 
          60 minutes | 
        
      
      
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          Answers Included
         | 
        Yes | 
      
      
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          Language
         | 
        English | 
      
      
        
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            Keywords
           | 
          expression, perimeter, variable | 
        
      
      
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          Simulation(s)
         | 
        Area Builder (HTML5) | 
      
    
    
    
    
    
    
    
    
    
    
    
    
    
    
      
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          Author(s)
         | 
        Jennifer Moeller | 
      
      
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          Contact Email
         | 
        jennifer.moeller@bvsd.org | 
      
      
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          School / Organization
         | 
        Boulder Valley School District | 
      
      
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          Date submitted
         | 
        8/8/19 | 
      
      
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          Date updated
         | 
        8/8/19 |