To investigate students’ fractional knowledge and algebraic reasoning
in the domain of writing and solving equations, we conducted a taskbased
clinical interview study. Clinical interviews are a way to collect
and analyze data to reveal students’ hidden thinking process (Clement,
2000). Clinical interviews can draw out students’ naturalistic thinking
and provide evidence for building models of students’ understanding.
Within the larger study, the first author conducted a case study of two
students, one of whom was Willa. A case study is an analysis of people
or events that are studied holistically (Thomas, 2011). Outlier cases that
are extreme or atypical tend to be selected as subjects more often than
representative cases because outliers can produce novel insights
(Thomas, 2011; Yin, 2009). Case study methods usually involve an
in-depth, longitudinal exploration of a single individual, a collective
(e.g. classroom) or an event.
To investigate students’ fractional knowledge and algebraic reasoningin the domain of writing and solving equations, we conducted a taskbasedclinical interview study. Clinical interviews are a way to collectand analyze data to reveal students’ hidden thinking process (Clement,2000). Clinical interviews can draw out students’ naturalistic thinkingand provide evidence for building models of students’ understanding.Within the larger study, the first author conducted a case study of twostudents, one of whom was Willa. A case study is an analysis of peopleor events that are studied holistically (Thomas, 2011). Outlier cases thatare extreme or atypical tend to be selected as subjects more often thanrepresentative cases because outliers can produce novel insights(Thomas, 2011; Yin, 2009). Case study methods usually involve anin-depth, longitudinal exploration of a single individual, a collective(e.g. classroom) or an event.
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