Here are some resources to get you going on negative numbers.
This video from the US introduces you to negative numbers and shows you some places where you can find them in the real world
This first video introduces you to negative numbers in context.
This episode of Maths Mansion asks you to find the difference between a human being and a fish finger. Watch the video to find out more.
In this video, Quiff and Boot help us to compare the value of negative and positive numbers.
This game from Nrich is a good place to start when getting to grips with negative numbers