This workshop should be facilitated by someone who already has a background in anti-racist theory.
Challenging White Supremacy (CWS) is an American group that holds workshops about how activists can destabilize systemic racism within grassroots movements. They’ve devised this workshop guide for helping white activists organize with an anti-racist lens.
Other exercises to complement this workshop are
Tools for white guys working for social change
Role of white people in ending racism
Further reading
White Privilege: Unpacking the Invisible Knapsack by Peggy McIntosh