This paper describes 8th graders learning ecology in a 6 week field unit, under the guidance of a science teacher and a math teacher. Students make impressive progress in learning how to 'mathematicize' their observations into maps, tables, graphs, and other 'inscriptions.' Student learning is assessed through a well-designed 'Lost Notebook Problem' in which students have to interpret a data set similar to that which they have been collecting and analyzing in their field work.
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