As is suggested by the title, this chapter presents research on algebra learning and teaching that has been carried out in various technological environments, more specifically those where the focus has been either multiple representations in computer and graphics calculator environments, or dynamic control, or structured symbolic calculation. Discussion of these three areas of current research interest in technology-supported algebra education serves as a backdrop for reflecting on the duality of algebra with its multi-representational functional approaches, on the one hand, and symbol-based manipulation perspectives, on the other. A fundamental assumption of this chapter is that technological environments, if they are to support the learning of school algebra, ought to provide abridge to algebraic symbolism.