If you've never used Second Life before then you will need to ...
a) fasten your seatbelt
b) visit www.secondlife.com where you should
i) register yourself (all free ... no need to upgrade to premium)
ii) choose a name for your Avatar, you have a choice of a surname from a set list
... but you can choose anything for a first name (cannot change this later .. so be creative)
iii) choose an initial look for your Avatar from the standard ones offered
(can be completely changed later)
iii) download the S.L. viewer (PC or Mac)
c) Fire up the viewer (see comment below about graphic cards)
i) sign in with your Avatar name and password
ii) go through the orientation that has been designed for 'newbies'
d) play / explore
To get to Int.Schs.Island there are several options including
i) put this address in the chat window (bottom left corner in S.L.viewer) http://slurl.com/secondlife/International%20Schools/64/90/24 (press 'say')
ii) it then comes up in chat history as a live hyperlink ... click on this ... then you should get a button to teleport to the island ... click
i) Open up the S.L. viewer and log on (in?)
ii) put the above URL (actually called an SLURL) into your web browser (computer may start moaning at this point if old) ... a blue box should come up over a map of the island ... click 'teleport' ....
iii) a blue (teleport) button should then come up in your S.L. viewer .. click that and you should be teleported direct to the area next to the Towers on International Schools Island
Some points to note ...
a) initially 'nubies' in Second Life usually communicate only with Chat and Instant Messaging ...the menu for this is bottom left of S.L. viewer
b) if you want to use voice (which I'd encourage) .. plug in headsets .... and enable chat .. top left of viewer Edit=>Preferences=>Voice Chat .. tick the box 'enable voice chat'
c) techni note ... some graphics cards are just not up to the job of displaying S.L. ... if you have an old machine or Intel graphics card then this might be a problem. (sorry)