And so is your teacher, isn't she?
The story is basically saying that we can learn from our elders, because they have been around longer and have more experience than us.
You can see this when it says "the tree is older than you are...you might find stories in its branches".
Answer:
i was googling the answer but then i found this without a response so i guessed :p
The only error I can see in this sentence is roll-a-coaster. I believe it should be a roller coaster instead, which is a ride in amusement parks. Other than that, it is more grammatically correct to say "I've just gotten off the wooden" rather than "I just got off the wooden" however, it's up to you.