This study analyzed how two language teachers annotated a corpus text for pedagogical purposes. The teachers were given training on corpus annotation and then annotated the same text segment. The researchers found that the two teachers annotated the text quite differently, with one teacher providing more categories, keywords, and denser annotation. This shows that pedagogical annotation is subjective and influenced by the individual teacher's approach. However, the study also found some agreement between the teachers. Analyzing patterns in a teacher's annotation behavior, such as through measures of category and keyword density, can provide insight into how they approach mediating corpus resources for language learners.