This is an opportunity for your unit to get creative or get active. From running to space hoppers, swimming to eating challenges.. mile of spaghetti anyone? Let us know what you get up to by tweeting us your photos.
Girls can either get sponsored or make a donation to take part - and don’t forget to order the Mile for Macmillan badge.
We'll be shouting about this challenge in the summer term of 2019, but take part whenever is good for your unit!