The projects across the UK include an Alternative Provision school in the Midlands, the design and build of a new sports hall in Yorkshire and the construction of a new primary school in the North East.
These wins push the number of projects ISG has secured through the framework to eight.
The largest job will see ISG deliver a £5.5m new primary school, Wynyard C of E School, of 420 places in Billingham, County Durham
In the Midlands, ISG has been appointed through the ESFA to deliver the latest phase of development at the Solihull Alternative Provision Academy, adapting offices into teaching facilities.
The scheme, worth £3.6 million, will provide 22,000 sq ft of school accommodation through the conversion of the former office block. ISG expects to start on site in early 2018, with a phased handover in Easter and summer.
The third win for ISG sees the expansion of The Stephen Longfellow Academy, sponsored by Gorse Academies Trust, which opened earlier this year to provide 300 primary and secondary places in Leeds.
Valued at £3.7m, the project involves the construction of a new sports hall and internal alterations to the existing academy.
Work starts in February 2018 and is expected to complete in September the same year.
Dr Sarah James, national framework director at ISG, said: “Working closely with our framework partners, ISG will play an important role in the transformation of our education estate, delivering facilities that will have a lasting impact on local communities.”