Although it may be difficult for most people to understand and impossible
for others to believe, the future has already happened. This is one of the
fundamental concepts in the area of time travel. I'm sure you have
heard of instances where people have placed various objects in a
sealed container (time capsule) to be opened at some time in the future

Although you are currently in high school, in the future you have already
graduated from college and begun your career. The purpose of this
assignment is for you to send a message to yourself, 10 years into the
future. Unfortunately, the US Postal Service is unable at the present
time to deliver mail to another time, so we will just have to wait for the
mail to catch up to the future

What you write in your letter is totally up to you and confidential. I WILL 
NOT READ IT. YOU WILL PLACE YOUR LETTER IN A SEALED
 ENVELOPE. You should address it to yourself(use you present home
address).  I will collect the letters, put them in a folder, and exactly ten
years from today, I will mail it to you.  By then, you will probably have 
forgotten ever  writing the letter and will be surprised to receive a
message from the past.