Outline (1) Theories in applied linguistics: SLA not SLT (2) Concepts for an explanatory theory of SLT – 2.1. Explanatory theories – 2.2. Multiple causality and oPen systems – 2.3 Aclivc agents intcracting – 2.4 Lcvels of thmry –– (3) Gencrative mcchanisms relating SL learning and teaching – 3.1 Thc tcachcr-lcarncr system –– (4) Elemcnts of a systematic theory of SLT – 4.1 Good systcmatics is that which rcflects cxplanatory theory – 4.2 Elements of a thtx.rry of SLT bascd on SLA – 4.3 Elcmcrrts of a theory of SLT not basc'd on SLA: Teaching leamcrs as opPoscd to teaching a leamer –– (5) lndividual theories of SLT and a scientific theory of SLT –– (6) Summar
