Thames Valley Police is asking former students and employees of Garth Hill School, Sandy Lane in Bracknell to get in touch to assist with an ongoing investigation.
They are appealing to anyone who was at the school in the late 1970s and early 1980s to contact them.
It’s in connection with an investigation into allegations of non-recent sex offences against girls aged 12 to 15.
Officers have been investigating the offences by tracing former students and other potential witnesses in the case.
A 66-year-old man was Windsor was arrested in November last year and has been released under investigation.
Anyone who was at the school in the late 1970s and early 1980s who has any information that may assist the investigation is asked to call 101 quoting reference number 43170093913.