Substitute from Mars

When a substitute teacher shows up acting very strangely — eating chalk, giving bizarre homework, and accidentally using alien gadgets — the kids must decide whether to expose the alien or help them survive the school day before the principal catches on.

It was a perfectly normal Monday morning at Pinecrest Elementary. You dropped your backpack at your desk, yawned, and waited for Mrs. Henderson to start class. 'Same old Monday,' you thought. 'Same old everything.'

But Mrs. Henderson was nowhere to be seen. Instead, the door swung open and in walked the tallest, skinniest person you had ever seen. They wore a suit jacket backwards, had bright green sunglasses on indoors, and smiled so wide it looked like their face might split in half.

'Greetings, tiny Earth -- I mean, children!' the stranger announced. 'I am your substitute today. You may call me Mr. Zelpho.'

'Did he just say Earth?' you thought. 'Did he almost say tiny Earth?'