Future school

"Zero zero", the alarm clock rang, I found a letter on the table after I got up, the letter said very strange::
Xx classmates:
Hello, I am a happy angel from Happy Planet. You have come to the 50th century, and everything here is very advanced. I hope you have a good day.
Happy Angel xxxx Year xx Month xx

I walked up the street with a happy mood and came to school unconsciously.
The school is like a garden, with flowers and trees everywhere, and the air is very fresh. Walking into the classroom, the tables and chairs in the classroom can be raised and lowered according to individual needs. The walls on the ground are made of cotton, so that it will not hurt if it falls. The blackboard is about the same as the TV. When you are in the language class, the blackboard will change the picture with the teacher's lecture content.
Get up quickly, stay late for school. It turned out that I was dreaming!
The future world is really a period of advanced technology. I really hope that this day will come soon!