There are numerous subjects that researchers could examine. Among those that are currently of great interest in the area of L2 learning:

  • The concept of internal grammar, its operationalization in research and its characteristics at different levels;
  • Internal grammar and its relationship with the threshold levels proposed by Cummings (1984) in L2 learning;
  • Development of reading skills and the role of internal grammar;
  • A re-conceptualization of traditional grammar to facilitate the distinction between internal and external grammar;
  • NLA teaching strategies to teach internal grammar (for oral competence) and for external grammar (for writing skills);
  • Adaptations of teaching strategies for adult students;
  • Cognitive development in the NLA;
  • Subject integration and results in other subjects.