Bingo! I absolutely loathe multiple choice exams for this very reason. All they show in many cases is that students are good at eliminating possibilities and/or guessing.
I'm a 5th grade teacher, and our state has an unbelievable emphasis on standardized testing. I literally spend hours each week charting and graphing each of my students' progress on each standard being taught. This paperwork is presented each Friday morning during a grade-level meeting where I have to explain why Johnny, who is on an IEP and so hyperactive that he literally bounces in his chair all day, chose "B" as his favorite letter and thus scored a 40 on that week's assessment. I am required to follow a pacing calendar that allows 4 days of teaching followed by an assessment day. Sometimes there are 3-4 standards required to be taught in each subject within those 5 days. Any student making less than a 60 on the 5 question assessment is put into remediation the following week, which I am somehow supposed to squeeze into the 60 minutes I am allowed to teach a given subject during the day.
I have students who cannot multiply 2 * 3 without drawing pictures, but I am supposed to show mastery of three-digit by two-digit division in 4 days. As an added bonus, my teaching certificate number is attached to each child's state testing. Their test scores account for 50% of my total evaluation. It does not matter that Johnny's dad beats the crap out of Johnny's mom and Johnny on a daily basis. It does not matter that Susie hasn't eaten since her free lunch in the cafeteria the previous afternoon. It does not matter that Julie hates me and knows that a poor test score has absolutely no impact upon her future because she knows it has an impact on mine. It does not matter that I have 5 students on IEPs who have IEPs stating they need the modified state exams because my school, by law based upon school population, is only allowed to choose 2 students from the entire building to take the modified exam. Education is messed up!
I absolutely love teaching, but the legislation put forth by those who have never darkened a classroom door for any purpose other than to say that "anyone can teach" is driving good teachers out of the classroom. Until parents must take equal responsibility in their child's education and teachers are no longer forced to structure curriculum to the masses and the almighty test, I will be saddened and truly fearful for the futures of many of today's students.
Please excuse my rant.