Read this blog ! Practice your English! Come on ( venga ya)!. No deadlines (fechas tope). No exams. It's just a fun way to learn the language.
It's not secure because it doesn't have to be. But look again when you try to log in to check your schedule or your record and you'll se there's a "https" instead of "http" That happens beacause you're exchanging important information with the webpage, you send your username and password and the webpage allows you to see your private record and schedule. It is when you exchange "critical" information with the webpage when having "https" is important.