This chapter provides a survey of work on two dimensions of L2 writing in academic contexts seldom analyzed in combination thus far (but see Manchón, 2011a): the dimensions of learning to write (LW) and of writing to learn language (WLL). The former corresponds to theory and research concerned with advancing understandings of the various facets (personal, social, educational, sociopolitical, ideological, cognitive, and linguistic) of writing in an additional language. LW preoccupations constitute the backbone of most L2 writing studies, as evidenced in the list of contents of this volume.