The pupils, aged from 14-18, took part in the popular annual event at Robert Smyth Academy on Burnmill Road on Thursday February 6 - Friday February 7.
And they aim to have raised hundreds of pounds for their two chosen charities – the Teenage Cancer Trust and CLIC Sargent.
Here are Andrew Carpenter's photos from the event.
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5. Robert Smyth 2020 Lockin
Students parade in their teams before the start of the 2020 Lockin at Robert Smyth Academy. | jpimedia Photo: PICTURE: ANDREW CARPENTER
6. Robert Smyth 2020 Lockin
Erin Brant speaks to the students before the 2020 Lockin. | jpimedia Photo: PICTURE: ANDREW CARPENTER
7. Robert Smyth 2020 Lockin
Front from left, Mike Scully with Ben Brant and Erin Brant before the Robert Smyth Academy 2020 Lockin raising money for Clic Sargent and Teenage Cancer Trust. | jpimedia Photo: PICTURE: ANDREW CARPENTER