The three new-build schemes are at Kingswood College of Arts, Oakfield Special Needs School and Andrew Marvell Business and Enterprise College
Work on all three projects is scheduled to finish by January 2013.
The latest awards follow Morgan Sindall’s first wins in March last year when the firm landed the first two new-build contracts, worth £71m, under the programme where work is nearing completion
Paul Smith, Chief Executive of Morgan Sindall Group plc, said: “Morgan Sindall has a leading position in the education sector and a growing reputation for exceptional project delivery.
“We look forward to furthering our relationship with Hull City Council while working on these latest projects.”