Help Understanding Various Errors

Hello,

I was given a completed essay back from my teacher which had various grammatical errors circled. There were several of them I didn't understand when I read them later. There is some that I flat out don't think are even errors. If someone could give an answer to each of these in a numbered list it would be appreciated! So, I'm basically wondering if there is an error in each of these and what it is.

1. Even though we don’t know how the world will be decades from now, education attempts to teach people how the world will be like in just a few years from now.

2. They have an imagination and like to do things with their mind and body.

3. Public education takes that away from them and develops them onto a single path set out for them.

4. Education systems around the world are all the same in the way that they limit teachings of the arts.

5. Art classes are the bottom of the barrel of subjects.

6. Instead of pushingcreativity aside and trying to bury it, we should instead be encouraging it.

7. Creativity of expressions is something that every child is born with.

8. There is one thing that separates all children between toddlers and adulthood – education.

9. The arts are at the bottom of the barrel.

10. This places children on a singular path that focuses on a one size fits all attitude.

I realize there is a lot here. I thank anyone who takes the time to read this.