Not only do I not do it, I won't do it. Does this mean I don't have a clear plan for learning that day? Do my students feel there is no purpose in my class? Is it a free-for-all? Nope! I do post an agenda, but no objective. While I certainly have a learning objective each day, I choose not to post it. Here is why:
"At the end of this movie you will find out that the neighbor is the bad guy."
"Today you will watch a love story of two people that will break-up but ultimately realize they are in love and get back together at the end."
Can you imagine the ending being ruined before you even start? Certainly the writer/director of the movie knew where the story was going. They planned it. They took you on a journey, got you invested in the story, revealed things as it went along. You had moments of "ah-ha" and stayed engaged throughout.
So, think of yourself as the writer/director of a movie. Know where you are going, then, plan a lesson that gets kids interested in the story of the math. Bring them along on a journey. But don't reveal the ending just yet. Have students hooked, waiting for the next step. How is this problem going to get worked out? Would this strategy work here? No, it doesn't work? How about this? Yes! "Ah-ha!"