I have been working really hard to find new ways to intro grammar in my Spanish classes. I have been trying not to isolate the grammar by simply presenting the rules and having the students memorize them, because I find that they do not use the rules naturally in the future. This year, I tried something new when presenting Ser/Estar/Haber - instead of presenting them with rules, I showed them sentences that taught each rule. I gave them a story about myself (you would want to swap out my sentences/story and add in your own) but it had fluidity and it made sense. They understood these verbs better than any other year I have taught and I am applying this way of presenting the grammar to all other topics now as well! I really hope you enjoy and please delete the embarrassing pictures of myself and add your own :)
I also added the sheet I give them to take notes on while I present (I have them either write down one of the sentences that I used, or I challenge them to rewrite the sentence in a more personal way), a filled in notes sheet in case you have an absent student, a Connect Four game with Ser/Estar and then a quick easy reading activity with Ser/Estar that you could use either BEFORE or after the Intro PPt. It could even be a HW assignment (and I included the answer key).