I was able to find everything I needed at Target. I already had some ribbon and scrapbook paper. I started with clear bags.
Here is everything I put into the bags: goldfish crackers, paper clips, a highlighter, a pen, and Extra gum.
Here is one of each thing that I put into the bag.
Here is a sample list I found to get you started. I have also seen similar ideas on Pinterest and you might be able to find sayings there as well.
I hope I've given you a few ideas to honor the teachers in your life!