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An Analysis of Errors in Describing Solving Process for High School Geometry and Vectors
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고등학교 기하와 벡터 과목에서 풀이과정 서술의 오류 분석

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Type
Academic journal
Author
Journal
한국수학교육학회 수학교육 수학교육 제56권 제1호 KCI Accredited Journals
Published
2017.1
Pages
63 - 80 (18page)

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An Analysis of Errors in Describing Solving Process for High School Geometry and Vectors
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By analysing the examination papers from third grade high school students, we classified the errors occurred in the problem solving process of high school ‘Geometry and Vectors’ into several types. There are five main types ― (A)Insufficient Content Knowledge, (B)Wrong Method, (C)Logical Invalidity, (D)Unskilled Expression and (E)Interference.. Type A and B lead to an incorrect answer, and type C and D cannot be distinguished by multiple-choice or closed answer questions. Some of these types are classified into subtypes ― (B1)Incompletion, (B2)Omitted Condition, (B3)Incorrect Calculation, (C1)Non-reasoning, (C2)Insufficient Reasoning, (C3)Illogical Process, (D1)Arbitrary Symbol, (D2)Using a Character Without Explanation, (D3) Visual Dependence, (D4)Symbol Incorrectly Used, (D5)Ambiguous Expression. Based on the these types of errors, answers of each problem was analysed in detail, and proper ways to correct or prevent these errors were suggested case by case. When problems that were used in the periodical test were given again in descriptive forms, 67% of the students tried to answer, and 14% described flawlessly, despite that the percentage of correct answers were higher than 40% when given in multiple-choice form. 34% of the students who tried to answer have failed to have logical validity. 37% of the students who tried to answer didn’t have enough skill to express. In lessons on curves of secondary degree, teachers should be aware of several issues. Students are easily confused between ‘focus’ and ‘vertex’, and between ‘components of a vector’ and ‘coordinates of a point’. Students often use an undefined expression when mentioning a parallel translation. When using a character, students have to make sure to define it precisely, to prevent the students from making errors and to make them express in correct ways.

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