Twenty-three sets of twins graduate from same school year in the US

All 23 sets of twins got a special shout-out during their 'moving up' ceremony

Twenty-three sets of twins - which are all in the same year - have graduated from a high school in the USA.

The twins make up 10% of people in the school year.

Headteacher Tamatha Bibbo said it was "quite unusual" to get this many sets of twins in one year.

The group of 46 students - got a special shout out at their graduation ceremony.

"Extraordinarily high"

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Tamara Bibbo, who is the school's headteacher, said even though most years gets a few sets of twins, it's unusual for there to be this many.

"Given our numbers, we have approximately 450 to 500 children in each grade so this was extraordinarily high" she explained.

Twins account for around 3% of births in the US, according to the National Centre for Health Statistics, which makes the chances of having this many twins in one year group, very rare.

In the UK there's around a one in 112 chance of non-identical twins being born.

It's even less likely for identical twins - around a one in 250 chance. The NHS says around two-thirds of all twins are non-identical.

Why do some kids 'graduate' school?

In the USA, the school system is a bit different to how it is in the UK.

They have elementary for children aged five to 10, middle school for 11-13, and high school for age 14-18.

Kids leaving middle school to head to high school usually have a special graduation ceremony, where they celebrate finishing the three years. This is often called a moving up ceremony.

Classes are also organised into 'grades' based on your age. If you're in year six in England, you'd be in grade five in the USA.