This paper deals with the assessment of the crossdisciplinarity of technology-enhanced learning (TEL). Based on a general discussion of the concept interdisciplinarity and a summary of the discussion in the field two empirical methods from scientometrics are introduced and applied. Science overlay maps and the Rao-Stirling-Diversity index are used to analyze the TEL field with a scientometric analysis. The science overlay maps show that a wide variety of disciplines contribute to research in the field. The analysis reveals that the field has been operating on a relatively high level of crossdisciplinarity in the last 10 years compared to 6 other fields of reference. Only in 2004 a decrease in the level of crossdisciplinarity could be identified.