Brian Dodgeon, 61, of Barlby Road, appeared at West London Magistrates Court on Monday (17) after Isobel Jones-Reilly died at his home following a party in April.
The 15 year-old from Ramsay Road, Acton, who was a pupil at Chiswick Community School, was with several friends including Mr Dodgeon's 14 year-old daughter, when she complained of feeling ill, and collapsed at about 4am on April 23.
Paramedics arrived moments later and rushed Issy, as she liked to be known, to St Mary's Hospital, Paddington, but she died later that morning.
Mr Dodgeon, suspended on full pay from his job at the University of London's Institute for Education until the case is finished, admitted possession of party drugs LSD, ketamine, ecstasy, and psychadelic drug 5-MeO-DIPT - better known as Foxy Methoxy.
It is thought that Miss Reilly died after taking ecstasy, along with some of the other youngsters at the unsupervised house party.
Three 14 year-olds, including Mr Dodgeon's daughter and two boys, were taken to hospital and kept in overnight following the party.
At the time, Issy's parents, Lynne Jones and Patrick Reilly, released a statement paying tribute to their daughter.
They said: "Isobel's family and friends are devastated and heartbroken by her untimely death. We hope that if anything positive comes from this dreadful event, it is that others will make the right decisions to be safe and well in the future."
The case was adjourned for pre-sentence reports, and Mr Dodgeon will reappear at West London Magistrates Court later this month.