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18 |  | 
|  |  Involves students working in small groups to help each other learn
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19 |  | 
|  |  A sense that adolescents have that they are unique, untouchable, and that no one else can understand them
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20 |  | 
|  |  Mental workbench where information is manipulated and assembled to help make decisions
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21 |  | 
|  |  Limited capacity memory where information is retained for 30 seconds unless rehearsed
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22 |  | 
|  |  Involves students taking turns leading a small-group discussion
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23 |  | 
|  |  An expert stretches and supports the novice's understanding of and use of the culture's skills
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24 |  | 
|  |  Refers to changing the level of support over the course of a teaching session
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25 |  | 
|  |  Mental actions that allow the individual to do mentally what was done before physically
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26 |  | 
|  |  Emphasis is on collaboration with others to produce knowledge and understanding
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27 |  | 
|  |  A relatively permanent memory system
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28 |  | 
|  |  Adolescents believe they are the main actors in an imagined play, and all others are in the audience
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29 |  | 
|  |  Emphasis is on the individuals' cognitive construction of knowledge and understanding
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30 |  | 
|  |  Piaget's term for an individual's ability to recognize that the length, number, mass, quantity, area, weight, and volume of objects and substances do not change through transformations that alter their appearance
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31 |  | 
|  |  Piaget's concept of concrete operational thought, in which children systematically organize objects into hierarchies of classes and subclasses
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32 |  | 
|  |  Emphasizes that individuals actively construct knowledge and understanding
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