This presentation introduces five common text structures (chronological order, cause and effect, compare and contrast, problem/solution, and description) with examples, review, and discussion. This is a good starting point if you are just beginning with teaching text structure.
For ready-to-use texts and activities for teaching text structure, look at my other items:
Cause and Effect Texts for Teaching Text Structure
Chronological Order Texts for Teaching Text Structure
Problem and Solution Texts for Teaching Text Structure