Mentor Sentences

Okay, so strolling through on fb, and  I see this video about "Mentor Sentences". In my mind, I'm thinking this must be something like a "sentence stems" to help students with writing and speaking in complete sentences. But Nooooo!! This is so much more!! I like this idea of using a mentor sentence daily. I'm going to reflect to see how I can implement this concept into my classroom. What do you guys think?If you use please share your implementation strageties??  Math Saavy Teacher