Read along to practice your English and to learn the English phrases SIGN UP and SIGN IN In this English lesson I wanted to help you learn the phrase sign up. When you sign up for something, it means that you want to do it and the person organizing it is asking for people to write their names down on a piece of paper, or maybe to send their name in via the computer, maybe an email or an online form. At school, sometimes there are sports at lunchtime and students and teachers can play if they wan