Advocates say the Education Ministry needs to reduce the wait for specialist help further.
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It has cut the average waiting time for its early intervention service from 104 days earlier this year to 78 days in the five months to the end of November.
The Early Childhood Council and IHC said it was a start, but they didn't believe children with disabilities should have to wait any time at all for support.
Delays for the service blew out three years ago, rising from 72 days in 2016-17 to 105 days by 2018-19, and 104 days in 2019-20.
The service has long had the worst average waiting times of any of the ministry's special education services.