Pupils at Didcot Girls’ School will have a non-uniform day in memory of tragic teen Jayden Parkinson, who died last year.
Pupils have been asked to wear purple – the 17-year-old’s favourite colour – on Friday for £1.
Cash will go to her family who are setting up a charity in her name.
Her body was found in a Didcot cemetery on December 18 after a search involving more than 100 police officers.
Her boyfriend Ben Blakeley, 22, of Christchurch Road, Reading, is charged with her murder and perverting the course of justice.
A 17-year-old Didcot boy, who cannot be named for legal reasons, is also charged with perverting the course of justice.
Both remain on remand ahead of their next appearance at Oxford Crown Court in a fortnight.