Fund foot bands for chairs to boost focus - kids stay on task about 10% longer = 45 minutes in a day! 

https://www.amazon.com/Bouncy-Bands-Original-Student-Sensory/dp/B01L7OPCJQ/ref=sr_1_2_sspa?keywords=foot%2Bbands%2Bfor%2Bchairs&qid=1552496207&s=gateway&sr=8-2-spons&th=1