On the first day of school this year I showed my students a web of 8 mathematical things about myself. Instead of just introducing myself, they had to solve the math problems to figure out things about myself. Afterwards, they then created their own math webs showcasing Eight Math Things about themselves. It was an awesome first day activity and great review of PEMDAS! :)
This could be adapted for all subjects - the document is blank but the web with 8 spaces is all you really need! Fill it