Competition winners Steph Shore, 15, and Kirsty Parish, 15, received a £50 voucher each, donated by Pier Amusements, TK and Taj Bola, Coinsville arcade, and Currys.


The posters will be displayed throughout Skegness to launch Truancy Watch, an initiative led by the police, East Lindsey District Council and the school.


Sgt Andy Hickinbottom said: "When parents see their children off to school in the morning, they believe they will be supervised until they return home.


"Truancy puts pupils at risk and it is this risk we are trying to reduce.


"In addition, we believe some youngsters are skipping lessons and drifting into petty crime and anti-social behaviour. Through the Truancy Watch initiative, we aim to grip this at an early stage.


"We need to send a strong message to all youngsters that skipping lessons is not an option, that they will be dealt with robustly and their parents will be informed."


The scheme is being trialled at St Clement's because its attendance rate does not meet the Government target of 95 per cent.


If it is successful it will be rolled out to other schools.


Pupils have taken part in a workshop and their attendance will be reviewed at the end of each term.


Any student caught skipping school will be returned to school and their parents will be notified.


The posters will encourage members of the public who see students out of school to let the school or police know their whereabouts.