Abstract: A modular forming system with nesting brackets between associated stacked modular panels to join modular panels when stacked. As a part of the forming system, a modular panel is described having a forming member with a plurality of studs affixed to the non-forming surface, and a plurality of stiff-back structures affixed in a spaced-apart relationship to the plurality of studs. Each stiff-back structure includes a lower bracket having a slot therein and an upper lifting bracket having a lifting member adapted to slidably engage the slot in a lower bracket of an associated stacked panel arranged above the modular panel, and allowing the engaged brackets to be removably joined together.