spark their passion for learning
This is the only meaningful thing in the essay.
All it says is that you want to be a teacher, but do you know that there are different PHILOSOPHIES about education? What is yours? You should google around about "education" and "philosophy."
Also, if you read some articles written by educators in the past 2 or 3 years, you will learn the most advanced concepts. That will give you a great idea to write about. What you want to accomplish depends on how much you have read about 21st century education.
Go google around about it! :-)