You should SEE EVIDENCE of your students' learning EVERYDAY. Exit Slips are an excellent way to ensure that your students are reflecting on their learning as well as a way to keep tabs on their progress.
It's Raining Resources!: Growth Mindset Vs. Fixed Mindset. I think this would be a great activity to do with kids after explaining fixed vs. growth mindset. Start with empty speech bubbles and have the kids fill in the phrases according to what they think someone with each mindset would say.