A Researcher Has Developed a New Mathematics Program and Wants

A researcher has developed a new mathematics program and wants to study how it is implemented. She is particularly interested in how those most resistant to change will use the program. Hence, she selects two teachers who are known to have very little interest in changing their mathematics teaching. In this case, the researcher has used:

A) Negative-case sampling
B) Opportunistic sampling
C) Typical-case sampling
D) Critical-case sampling

Correct Answer:

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