When Seeing Double Isn't Trouble

At Mulhall Elementary School, almost every classroom has a set of twins.

In the second grade, there are four sets, meaning every teacher's got double vision.

And, when The Early Show National Correspondent Hattie Kauffman stopped in, most of the twins admitted to her that they'd tricked their teachers.

"In preschool," confessed Cassandra Gastelum, "we used to trade classes."

And, adds her twin sister, Alejandra, "We didn't caught! We didn't even get in trouble."

Cassandra and identical twin sister Alejandra found it so funny, they fell to the floor, laughing.

They admit to being double trouble.

"When I get in big trouble, I blame it on (Alejandra)," admits Cassandra.

"And when I get in trouble," concedes Alejandra, "I blame it on (Cassandra)."Another pair also fooled teachers, until their mom came up with the idea of having them wear pink and purple ribbons.

"I can throw pink on Monique and purple on Monica," says Gina Montano, "and it will always be in their hair. Every day."

That is, Kauffman points out, unless they pull them off.

Even some of the parents can sometimes be stumped.

"They both have a mole (in the same place on their faces), the same hair, everything," says Jose Velez of his twins.

Teachers have resorted to counting freckles.

And lost teeth can be a clue.

Statistically, there should be just half as many twins in a school this size.

Maybe it's something in the water, Kauffman kids: In addition to the nine sets of twins, a teacher's aide is on maternity leave with -- you guessed it – twins.

What's going on?

"If I knew, I'd tell you! I just couldn't believe it when they started coming through the door," says the school' principal, Dr. Lillian Prince.

With so many dynamic duos, imagine the multiple mischief that lies ahead, Kauffman remarks.