The development of auditory temporal resolution in normal hearing school-age children was examined through word recognition performance in spectrally identical continuous and interrupted noise. Eighty normal-hearing children, aged 6 to 15 yr, and 16 normal-hearing young adults participated. NU-CHIPs stimuli were presented in quiet and in both noises at signal-to-noise ratios (S/Ns) of 10, 0, -10, and -20 dB. Younger listeners did not experience an equivalent perceptual advantage (i.e., a release from masking) in the interrupted noise at poorer S/Ns (i.e., < 10 dB). Further, they required more favorable S/Ns to perform the same as the adult participants. Children's performance equated that of adult levels in quiet and noise after 7 and 11 yr of age, respectively. Changes in word recognition performance across age groups seems to proceed with the same long developmental time course in both continuous and interrupted noise. It was speculated that these changes reflect maturation in the central auditory system.