The TETS (Topic Exploration with Text Structures) worksheet increases student literacy and provides a scaffold for critical thinking around a specific topic or concept. The text structures listed require increased critical thinking as they proceed down the rows of the chart. The list of graphic organizers is provided to help get students thinking about topic relationships graphically, but is not exhaustive and students will typically need to create their own graphic organizer to meet the needs of the specific topic they are investigating. I usually require my students to complete the text in each of the successive rows of the worksheet, but it is also effective to let students select any two or three rows and then have students share with the class to show the various ways that other text structures may be used for the given topic. There are generally multiple ways to complete each row and I encourage students to compare ideas. I use TETS in AP Biology, but it may be used in any subject. It is especially useful for English Language Learners (ELLs). I have provided an exemplar on the topic of photosynthesis (AP level).