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CTET 2 Math and Science Feb 2014 Paper
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Question : 57
Total: 120
Read the approaches used by the two teachers to teachsolving of linear equation, say 2x – 6 = 10 :
Teacher A
Teacher B
Steps
steps
(a) Take 6 on other side
(i) Equation always maintains
equality. So same operation
with same number can be
performed on both sides to
maintain equality
(b) Change the sign
of 6 and add to
10
(ii) Hence,
2x – 6 + 6 = 10 + 6
or 2 = 16
(c) Get 2x = 16
(iii)
2
x
2
=
16
2
or x=8
(d) Take 2 on theother side anddivide
(e) Get x= 8
It can be observed that
teacher A emphasizes on instrumental understandingwhile teacher B emphasizes on relational understanding
teacher A emphasizes on relational understanding whileteacher B emphasizes on instrumental understanding
teacher A focuses on conceptual knowledge whileteacher B focuses on procedural knowledge
teachers A and B focus on instrumental understanding
Validate
Solution:
Instrumental understanding is having a mathematical rule and being able to use and manipulate it. Relational understanding is having a mathematical rule, knowing how to use it, and knowing why it works.
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