Lesson on Translating shapes, and introducing vector notation. Lots of examples (skip through as required). Make sure you have an extension activity lined up for when they finish, you can find lots of good ones around TES.
One. Two. Three. Many.
Terry Pratchett tribute maths resource - how to count in troll.
Looks at counting using a base four number system, and can lead to thinking about number systems with different bases (with some examples on the final slide)
Idea taken from the Discworld book "Men at Arms".
Please modify to your own desires.