Twin paradox.....confusing?

Acceleration has an affect on time. The faster you are traveling the slower the time is but this does not affect our everyday speeds. This is true when you move near speed of light. I mean it is true for our everyday speeds as well but not significantly ... actually let me double check on this... I KNOW FOR A FACT THAT THE BOOK IS RIGHT.... but right now i'm working on calculus... so when i have time i'll check it out... and post it back here... post the reason and the explanation.