English as a second language teachers often find themselves teaching classes of heterogeneous students who have very divergent English language skills, abilities, and learning needs. One effective approach to address some of the challenges teachers face when teaching heterogeneous, mixed-level classes is task-based language teaching (TBLT). TBLT begins with a needs analysis to determine the types of real-life tasks learners need to accomplish, and then classroom tasks are developed to meet the learners' language use needs. This article provides teachers with information on three task-based language teaching frameworks to guide their selection and design of classroom tasks. The task frameworks illustrate how to select and modify the instructional content, learning process, and products to match students' language proficiency levels and needs. Numerous examples of task modifications and ideas for adapting authentic resources are presented.