Educational guidance services play a key role in implementing educational reform in the Netherlands. There are about 70 state-financed educational service centers that support individual schools by providing such aids as psychological assessments, theoretical and methodological advice, teacher training, guidance, development, and educational innovation. The centers also serve as media centers and information clearinghouses, act as liaisons between schools and the authorities, and provide orientation programs for initiating state-mandated education reforms. The services are confined to primary level schools for ages 4-12. The conclusions of this program review are that teamwork and cooperative development lead to implementation of the reforms and that the national centers effectively support guidance services. (NL)