How to use a Planisphere
A planisphere consists of a star chart and horizon overlay. Depending on the time of year and the time of night we see different stars in the sky. To use the planisphere one faces North then turns the horizontal overlay until the month and time are correct. The stars which can be seen on the planisphere should match up with those in the sky.
If you are studying GCSE astronomy you should buy your own planisphere and get used to using it. On the links page is a download where you can print off your own very basic version.