"All things are difficult before they are easy."
While I probably won't ever develop an abundance of 3-Act lessons like Dan Meyer, more than likely won't create a great site like 101QS, and it's highly doubtful that something like Estimation180 is in my future, my students are having fun learning a historically boring curriculum from a collection of online resources (like those stated above) and the ability to express their understanding in a number of ways.
Bottom line: kids who enjoy learning want to learn more.
Bottom line: these kids want to learn and are learning more than I could have ever offered them with a textbook and worksheets.
Teaching is not easy. Teaching with fun and relevance makes it a whole lot easier.