This is a site I use all of the time where I tutor. It is geared mostly towards elementary and lower middle school students. I go straight to: http://bedtimemath.org/category/daily-math/ and use any of the problems posted daily as a warm-up for students. The problems are creative, real-world and entertaining. Read about the world's fastest-moving hot tub: http://bedtimemath.org/fun-math-carpool/

This packet contains the principles of problem solving by George Polya, a renowned mathematician. It contains numerous strategies like guess and check, draw a picture, work backwards ... The packet consist of walking you through 12 different strategies with examples and practice problems for students. For an extended list of problems for practice, Go to: http://www.austintown.k12.oh.us/~aust_tr/PSS%20Student%20problems%202001.pdf For a worked out answer key go to: http://www.austintown.k12.oh.us/~aust_tr/PSS%20hand%20solutions%2013%20to%2083.pdf

Socrative is a site where teachers can create assessments for their students to take using laptops, tablets or smartphones. Teachers can watch in real-time as their students progress through the assessment.