In Vygotskyan sociocultural theory, tools are used in mediation, that is, in human interaction with the environment. Tools can be physical artifacts, but may also be psychological or symbolic. Symbolic tools include music and art, number systems, and language.
SCT views language as a tool of the mind, a tool that contributes to cognitive development and is constitutive of thought
(Swain & Deters, 2007)
Read more: SCT research