Not every test a student will encounter will be an open end question or essay. Look at these benchmark exams students all over America are having to take. They spend a week or more on those gosh darned multiple choice exams!
Have you considered that perhaps a teacher's workload is so heavy that they possibly could not get every paper graded by hand on time by the district deadlines so they issue these MC tests and use these handy little things called 'scantrons' quickly grade them.
Also with this ludicrous NCLB crap teachers are no longer teaching the subject matter but are instead teaching exactly what is on the Benchmark exams in hopes their students do well or it's their skin. Forget what the subject matter really is!
I know this because my father was a biology teacher. Over the years I have noticed a big change in his material. Before he was allowed to use various experiments and assignments to teach the concepts students needed to learn. One year he had his class dissect baby pigs. In more recent times shortly before he retired, he was no longer allowed to have his class dissect animals as the state felt that the students could learn just as much via a 'virtual' dissection on the computer. Only a couple of problems, there were 30 students, one computer, and no projection screen. It was absolutely pointless. This was meant to 'enhance' the students use of technology. Well shit by this time all students had cell phones, some even had iPods. All of his students were far more familiar with a computer than my father ever would be.
The state and federal levels of 'education professionals' have placed more restrictions on the teacher in the name of 'student enrichment'.
I had benchmarks for Geography. Their scores went up.
Social Studies isn't tested statewide, but I guarantee if you came into my, oh, I don't know, U.S. history class and tested them on the basics of American history, they'd pass. You can't pass my class without knowing those things. You also can't pass my class unless you get THE BIGGER PICTURE. Just like I can't pass a class without producing a research paper - one that has the details AND a bigger picture.
Multiple choice is great if you want to see where they are in a unit. Or if you're doing a pre-assessment. Or if you want them to practice! My friend is a cognitive psychologist at a nearby university. He studies testing theory and memory. Multiple choice quizzes
can be a great teaching tool, like a memory booster, but they make awful tests.
Teaching the test? That would be easy. If you teach right, they'll not only get "the test", but they'll have transferable knowledge. And hopefully some critical thinking skills.
*edit It takes extra time, much more than what you get paid for. But if you REALLY care, you work hard. I just can't "put my name" on a class if I knew I wasn't using proper pedagogical skills...that's just me. If I ever get burnt out, well, time to go. I actually think that learning about social studies is important. Learning English is important! So yeah, I bust my ass to make sure they can't wimp through.