Ali Mohammed Hajab, a member of her defence team, said: "The judge found Gillian Gibbons guilty and sentenced her to 15 days jail and deportation."
The maximum penalty for the charge, which has attracted worldwide attention was 40 lashes, a fine and six months in prison.
Teachers at the school say that calling the teddy bear Muhammad was not Gibbons' idea in the first place and that no parents objected when the school sent parents circulars about a reading project which included the teddy bear as a fictional participant.
Robert Boulos, of Unity High, said: "It's a very fair verdict, she could have had six months and lashes and a fine, and she only got 15 days and deportation," adding they would not appeal the decision.
Gibbons is expected to serve out her sentence in the Omdurman women's prison near Khartoum before being deported.
The director of the school employing Gibbons said that since she had already spent five days in prison she would serve only 10 days.
A British foreign office spokeswoman said: "We are extremely disappointed with the sentence and foreign secretary David Miliband has summoned the Sudanese ambassador to explain what has happened."
Muhammad is a popular name in Sudan but Islam forbids any physical representation of the Prophet Muhammad.