Do you want to Leave or Remain in the European Union?
That's the question facing everyone in the country over the age of 18.
Both sides - the Leave and Remain campaigns - are battling to convince the public. But what do young people think?
Recent polling shows they are most likely not to vote at all.
Our Political Correspondent, Paul Brand, went to Conyers School in Yarm, where campaigners met sixth form students.
This is the EU Referendum School Debate: