The paper explores the mathematical practices of deaf learners. More specifically, it aims to identify how learners whose first language is Libras (Brazilian Sign Language), a visual-gestural language, express mathematical generalizations. It begins with a brief history of how sign languages have come to be integrated in the education of deaf learners. This is followed by the introduction of some constructs from Soviet Psychology which has informed our research activities. Finally, we present snapshots of the practices which emerged as a group of deaf learners worked with activities involving pattern generalization, and analyze the evidences of algebraic thinking in their mathematical practices.
Deaf students; Algebraic thinking; Sign language; Mathematical practices; Generalisation
