Need lesson ideas?! The Smithsonian Institution has a website called Smithsonian Education. Within this site, there is a portal for educators. They offer a ton of useful information, lesson plans, and other resources to enhance instruction. The resources are also aligned to the TEKS. These resources could help you supplement those TEKS you just aren't quite sure how to get across well to your students!
Look around and find something to do with your students soon!