@ossobuco,
Of course you can teach creativity. I do it all the time.
Actually, I don't teach people how to be creative, I just figure out ways to unlock it. Everyone is creative in their own way. Anyone who says they aren't creative is lacking imagination, not creativity. And imagination can be "sparked." (Love that word, Osso.)
Here's an example: At the beginning of each semester, my middle school newspaper kids wonder how on earth they are going to come up with ideas for things to write about. I tell them they are reporters, and reporters are very curious people. They notice things everyone else passes by. And they ask questions about everything. I'll show you. See this white board? Who invented white boards? Whose idea was it to buy white boards for the school instead of blackboards? Where are the extra dry erase markers kept? Why are there eight different colors of markers in our room, but only black and blue in the Math room? How many white boards are there in the whole school? Yes, Shelby? How much did they cost? That's a good question. Yes, Dylan? Where did we buy them? There's another. Tristan? Who cleans them? I've wondered about that myself...good question! Caitlyn, you have one? How long will they last? I'll write that one down, too. Anybody else?
Then I give each of them a steno notebook and a pencil, and I turn them loose on the school grounds for 10 minutes. They are to go out by themselves and write down questions about anything they see. Anything they wonder about. I tell them the person who comes back with the most questions gets a prize.
I usually have about 10-12 students in this class. I typically get a total of about 120 questions, and I compile them into a list. Then I tell them that all these questions are possible article ideas, and they've just come up with 120 ideas in 10 minutes! They are amazed. Then I tell them that anytime they can't think of something to write about, they can use this list or just go take another "Reporter's Walk."
And off they go.....