The agencies are working in partnership with The Miriam Hyman Memorial Trust on a pro bono basis to support the launch of the schools programme, 'Miriam's Vision', which coincides with the 10th anniversary of the 2005 London bombings.
The programme has been developed by Miriam's family in association with the UCL Institute of Education and Copthall School in north London, which she attended.
It includes a collection of curriculum-based lesson plans, resources and guidance notes for teachers of 11- to 14-year-olds, to promote a more inclusive society.
Ben Caspersz, managing director of Claremont, said: "It is an honour to work with the Hyman family, who have responded to personal tragedy with a positive message of hope. Claremont is proud to join forces with On Broadcast and Hopscotch to help communicate the family's message and get Miriam's Vision used by as many young people as possible."
The Miriam Hyman Memorial Trust was set up in the wake of the 7/7 London bombings to promote an inclusive society, safer from extremism and violent terrorism.
Miriam was one of the fifty-two people killed in the attacks.