Eddie Woo teaches mathematics at Cherrybrook Technology High School, Sydney. He has been teaching maths for more than ten years.

In 2012, Eddie started recording his lessons and uploading them to Youtube - creating 'Wootube'. Since then, he has amassed a following of more than 1 million subscribers and his videos have been viewed more than 60 million times.

In 2018, Eddie was named Australia's Local Hero of the Year and shortlisted as one of the top ten teachers in the world.

Jess Black is an Australian author of children's books. She has written over thirty junior fiction books and two picture books, Moon Dance and The Bold Australian Girl (July 2017 release).

Jess is the author of the Keeper of the Crystals series and the co-author of the hugely successful Bindi Wildlife Adventure series, RSPCA Animal Tales series and The Kaboom Kid series with David Warner.