Identifying the Source in Falk's Article Using the I-BEAM Category

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Kasner & Newman, 1949; Love, 1989
The first two sources introduce the problems of the infinite, highlighting it is a historical problem. Falk introduces infinity from a historical perspective to highlight that it is an issue that people have tried to address. The sources belong to the background category of I-BEAM, where Falk provides general information on the topic of infinity.
Falk & Ben-Lavy, 1989
Falk uses the source to link his research with similar studies that seek to evaluate children's understanding of potential infinity. The source belongs to the exhibit category of I-BEAM to highlight examples similar to Falk's article. Falk uses the word "major aspects of infinity" and pilot studies on "children's understanding of potential infinity".
Gellman, 1980;
Falk uses the source to explain how the researcher asked children about their understanding of infinity. The source belongs to the argument category as Falk uses the source to affirm his experiments and research. Falk uses the words "interviewed young children," highlighting Falk's research link with other experiments.
Moreno & Waldegg, 1991
Falk uses the source to contrast how different researchers have conceptualized infinity and their explanations on actual and potential infinity. The source belongs to the argument category.
Falk uses the words "property of an infinity" and "actual infinity." 
Rucker, 1982
Falk uses the source to evaluate the concept of infinity as explained by different researchers. 
The source belongs to the argument category as it affirms an...