I taught 8th graders for the first time last year, and will be doing so again. I absolutely had a great time, thanks to the Holy Spirit. I can tell you with certainty that I was NOT alone
I had never taught in a classroom before, but I had coached boys and girls hockey and other sports, plus Boy Scouts. So I had plenty of experience with kids in that age group.
On day one I told them that they were now young adults and would be in high school soon, so I was going to treat them that way, not like little kids. It worked!
I had twenty two Sunday mornings @ 90 minutes each and wish I had more. Preparation for Confirmation was the ultimate goal. Unfortunately, most of my class knew nothing about their faith, or the Bible, or the Church. About half attended mass regularly, the others less so.
By the end of the class, we had about 90% success with a good foundation for these kids to have Christ in their life. Still not at the center of their lives, or even close to it, but such a vast improvement from day one when God was the old man in the sky and Jesus a loving hippy from 2000 years ago.
Not sure what you can accomplish in two weeks, unless it is a daily class. But of course you can do anything through the Spirit. I’m happy to offer more insight if you like.