order of operations from math goodies

My fifth grader found and tested this site on his own. I like the lesson combined with the quiz. It's been so long since I took a math class that although I know and understand concepts (usually), I can't recall the terminology. Sites like these (with explanations and quizzes) are especially useful. My son enjoyed the quiz although he thought that the last question in the order of operations wasn't relevant to the topic. Word problems, like this one, are a good way to test how to apply a concept.