[en] Z⁰ bosons have been produced by collisions of longitudinally polarized electrons with unpolarized positrons at the SLAC Linear Collider and their decays have been recorded by the SLD experiment. We present preliminary QCD results based on the first 6000 such decays. We find good agreement between the inclusive properties of these data and the predictions of perturbative QCD plus fragmentation models. The strong coupling, α_s, has been measured by three methods: jet rates yield α_s(M_Z) = 0.119 ± 0.002 (stat.) ± 0.003 (exp.syst.) ± 0.014 (theor); energy-energy correlations yield α_s(M_Z) = 0.121 ± 0.002 ± 0.004 ±_0.009^0.0016; the energy-energy correlation asymmetry gives α_s(M_Z) = 0.108 ± 0.003 ± 0.005 ± _0.003^0.008