It’s important to constantly consider what creativity is, what it means and how to instill it in students. Of course, my answer is simple: provide materials that would otherwise be tossed, compile by theme, add scissors and glue and you are all set.
Of course, for some, there will be the temptation to put creativity on a grid, or a metric, or a way to compare. But just as often we do find that people of influence do understand the value of creativity (see here, and here, and here, and here).
Of course, speaking out against the standardization and testing movement is important, but if you find yourself teaching in the midst of it (as in, it is mandated), then keep that stock of scissors and glue and you will keep the creativity going.