1 | He/she is aware of the development of the concepts of algebra and the historical process.
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2 | He/she is aware of the stages and the components of algebraic thinking and implements them into instruction.
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3 | He/she distinguishes the differant meanings of the numbers which are represented as letters.
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4 | He/she generates various models of algebraic expressions and uses them in mathematical inferences.
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5 | He/she knows the misconceptions and difficulties of the concepts of algebra which students encounter.
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