Judge Michael Lawson QC sentenced teacher Jeremy Forrest to four and a half years for the five offences of sexual activity with a child and one year for the offence of child abduction, to run consecutively.
He told Forrest:
Your behaviour in this period has been motivated by self-interest and has hurt and damaged many people - her family, your family, staff and pupils at the school and respect for teachers everywhere.
It has damaged you too but that was something you were prepared to risk.
You now have to pay that price.
It was your duty as a teacher to stop her infatuation, not to fuel it.
Your research into what might happen to you if you were caught is proof of the deliberate nature of your behaviour.
Jeremy Forrest has been jailed for five and a half years on five charges of sexual activity with a child and one count of child abduction.
A teacher described in court as a paedophile turned to his victim today and said "I love you", as he was found guilty of child abduction.