Munch needs the help of your students.
First he would like your students to figure out the cost of a meal that is 20% off. The meal is chosen by your students, so the options are plentiful. I had each student calculate a meal and then trade papers with a partner to verify the math was correct. They had a lot of fun practicing a somewhat difficult skill and I liked the variety so much that I put it on display for Open House.
Then Munch’s new servers are writing tons of bad checks---they need your students’ help to find, explain, and correct the mistakes. There are 4 pages included for this activity.
I used the first one as guided practice—it worked well to have all of my kiddos complete this with me—it allowed me to make my expectations clear and scaffolded the lesson for my students who always need that extra support.
The other three pages are similar to the guided practice but are at three different levels of difficulty. I put identifiable monsters on the pages to be able to tell which level paper I had at a glance.
You could also use the papers progressively if you prefer to have all of your students working on the same page at the same time.
I designed this activity for my 6th graders before Common Core moved calculating discounts and taxes to 7th grade. (However, I still use it with my advanced math group, especially as I am not yet sure if 6.RP.A.3c involves application problems like discounts and taxes.)