I have an acquaintance whose daughter's extra time accommodation is set up like this: She takes the test with everyone else, in class. If she feel that she needs her extra time, she writes, "need more time" on the top of the paper and turns it in with everyone else. If she wrote "need more time" on the paper, her teacher gives it to her special ed teacher, and she gets the test back during study hall to finish it. None of the other kids has to know or see anything.