I don't reward the students for any old thing, but for going the extra mile on something or for random acts of kindness I see performed in the classroom. (thelunchtray.com)
Therefore, it's important to concentrate on rewarding those students who are delivering. (qaeducation.co.uk)
But unfortunately, the practice of rewarding students with junk food is pretty common in schools around the country. (school-bites.com)