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Acting like a Grinch whose heart is 'two sizes too small' one Texan teacher caused outrage when she told her class of five-year-olds that Santa Claus does not exist.

Ruining Christmas for the students of Pease Elementary School in Austin, the teacher, identified as Mrs. Fuller told her stunned class that it was their parents who put presents under the tree and not Saint Nick.

Breaking the news to the kids during a lesson on real and imaginary things, the teacher asked her class to go home to mom and dad and confront them and ask to be told 'the truth.'

She said, 'None of you believe in Santa do you? and said that you buy all our presents and put them under the tree.

'She said you should tell us the truth.'