Tests

Teachers make some really hard tests. How am I supposed to write three full length essays in 50 minutes? I had a history test today and I was expected to do just that. I did not get all of them in. During the test the teacher changed his mind so we only had to write two essays and bullet point the last one. I did succeed in that though. And also, teachers make some tests really hard. Then they don't curve the tests. If a class average is a c, shouldn't something be changed? I don't know.