The official SIOP website says that the "Sheltered Instruction Observation Protocol (SIOP) Model is a research-based and validated instructional model that has proven effective in addressing the academic needs of English learners..." but I learned while an ESL teacher that what worked for English Learners also worked for native English speakers.
Implementing the full SIOP Model is a big task that requires training and professional development. I'm suggesting that you look the website over, and try some of the lesson plans and activities provided FREE. Even if you don't have English Learners in your class, you most likely have students who can benefit from the Comprehensible Input, Strategies, Interaction, and Lesson Delivery, as well as the Review & Assessment included in the model.
The lessons shared range from early childhood to Adult/GED, and as you look through them, you will see that careful planning and scaffolding are two of the most important features. The same, of course, is true of any lesson, for every level of students in every content area!
I think you'll enjoy looking these lesson ideas over to see what you can use. You can read more about the protocol and find answers to questions about it here.