This document outlines a task design model for telecollaborative language learning. It discusses challenges of telecollaboration and relevant theories that inform the model. The proposed model includes four layers - what students must do, want, can do, and the degree of autonomy they may have. It provides examples for each layer to illustrate how tasks can be designed or modified. The goal is to create meaningful, useful, and rewarding tasks for students while considering learner characteristics, learning goals, and context.