Some 12 architect-led teams are now required to draw up 'innovative and sustainable' plans for the regeneration of three existing schools in Southwark - Michael Faraday, Eveline Lowe and Southwark Park.
Sarah Wigglesworth Architects, Hawkins\Brown, Edward Cullinan Architects and Birds Portchmouth Russum have been listed for the Southwark Park Primary School.
And HKR Architects, Haworth Tompkins, Haverstock Associated Architects and van Heyningen and Haward are vying for the Eveline Lowe School.
The teams were chosen from 90 entries. According to the RIBA, a winning team will be chosen on the basis of concept designs and interview.
The RIBA said: 'We aim to find architectural practices that will produce inspiring buildings of exceptionally high quality, sustainability and functionality which will become synonymous with good design and the London Borough of Southwark.'