Janet uses many examples and non-examples of polygons in her class. She uses mathematical vocabulary and engages the students in discussion. She has the knowledge of errors and alternate conceptions of children too. As a mathematics teacher which of the following is most appropriate for Janet ?

Correct option is A

The answer is (a) She has pedagogical content knowledge.
Pedagogical content knowledge (PCK) is the combination of subject matter knowledge and pedagogical knowledge. Janet's use of examples, non-examples, mathematical vocabulary, and discussions demonstrates her understanding of PCK. Her knowledge of errors and alternate conceptions further supports her PCK. Subject matter knowledge is simply an understanding of the content being taught, while curricular knowledge is an understanding of the curriculum. Janet's use of PCK is what makes her an effective mathematics teacher.