What would you have written to your future self when you were in high school? That's the assignment one high school teacher has been giving his students for decades and what happened next is just amazing.

High school teacher Bruce Farrer doesn't consider himself an amazing teacher, but the assignment he's been giving students for decades may make you think otherwise.

Whatever makes it into the letter, makes it back to the student 20 years later.

Every year Farrer makes his class write a ten page letter to their future selves. They can write whatever they would like, things they want to have accomplished by then, thoughts on what the future will be like or just memories from high school they hope to never forget. Whatever makes it into the letter, makes it back to the student 20 years later.

Yes, Farrer has been tracking down students, filling out envelopes with decades old letters and sending out memories to his students for years.

I can only imagine what that moment of receiving the old letter is like, but as you can see from this video many of his past students get moved to tears. And all really appreciate the assignment all those years later.

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