The dream tells me you would be a good teacher! You are at odds with a school system who does not put the students well being first. Reflecting your real life situation. Try attending a different school to get away from those green spiders. Going through the murky waters indicates you are willing to take risks for the benefit of your students. You failed the test because you took the risk of Not giving the answers that you think they wanted. You followed your own heart and took the risk.