Eric Curts, a google master jedi, runs a free conference in August in the Canton area dealing with technology in the classroom. I had the pleasure to keynote the first Sparcc conference and I have presented every year of the conference since. It usually has around 500 teachers and 50 presentations in the one day formate.
Check out their conference homepage:
If you are interested in presenting you can apply on the page above. Proposals are accepted until May 4th, 2018. Hope to see you at Stark State in August.