The concept of task has become central not only to an understanding of language learning per se, but also to the design and research of Online Intercultural Exchanges (OIEs). While research on the design of tasks in OIEs has been very productive, we still lack insights into how teachers develop competences in task design on the micro-level. Consequently, this contribution looks at how OIEs allow pre-service teachers to develop such competences when designing telecollaborative task sequences for their future learners. Findings show that the most promising research approach to tackle this question at the interface between telecollaboration, Task-Based Language Teaching (TBLT), and teacher education is a stronger reliance on qualitative research because it helps understand what pre-service teachers do when developing such competences. [For the complete volume, see ED571330.]