Is it wrong to cheat on a test?

Hi, I am in 10th grade and I am a teachers aid….I am only allowed to be so if I have good grades. Being with the teacher opens up some opportunities that I otherwise wouldn’t have. I am left alone for moments at a time at various times throughout the week leaving me time to open up the teachers guide…I at first only intended on doing it once but now I find myself using these moments to copy nearly all the answers to all my assignments.  Is it wrong that I am taking advantage of the teacher like this? Is it cheating? Is it wrong to cheat on a test?