One-sided limits of a function at a point in a drug metabolism context as explained by non-compulsory secondary students Fernández Plaza, José Antonio Rico Romero, Luis Ruiz Hidalgo, Juan Francisco Partial modelling activity One-sided limits Nonauthentic drug metabolism model Spontaneous extension of a model Graphics Ninth Congress of European Research in Mathematics Education (CERME 9). Prague, Czech Republic, 4-8 February 2015. We present the results of an exploratory and descriptive study performed with Spanish students in Non- Compulsory Secondary Education focusing on how they explain the meaning of both one-sided limits within a temporal phenomenon (drug metabolism) given by a graphical non-authentic model. We organised the given explanations according to the following options: Only calculation; interpretation in a neighbourhood (locally); meaning of the value (pointwise); direction of approaching in time with regard to right-sided limit. We also highlight a particular attention to other elements of the model apart from limiting notions and some difficulty to give sense to right-sided limit, possibly because the direction of approximation is contrary to the natural progression of time. 2016-07-21T08:40:26Z 2016-07-21T08:40:26Z 2015 info:eu-repo/semantics/conferenceObject Fernández-Plaza, J. A.; Rico Romero, L.; Ruiz-Hidalgo, J. F. One-sided limits of a function at a point in a drug metabolism context as explained by non-compulsory secondary students. In: K. Krainer, N. Vondrová (eds.). Proceedings of the Ninth Conference of the European Society for Research in Mathematics Education. Prague (Czech Republic): Charles University; ERME, 2015. pp. 862-868. [http://hdl.handle.net/10481/42204] 978-80-7290-844-8 http://hdl.handle.net/10481/42204 eng info:eu-repo/semantics/openAccess Charles University. Faculty of Education; European Society for Research in Mathematics Education (ERME)