Hundreds of children will miss out on a spot at one of Sydney's most in-demand new public schools after the school's intake was slashed from 700 students to 65.

Lindfield Learning Village, which uses unconventional teaching methods and spans kindergarten to senior high school, was originally supposed to expand from 350 students this year to more than 1000 next year before reaching its target of 2000 in 2021.

One of the newly-built classrooms at Lindfield Learning Village, which opened in January.

There are thousands of families on its wait list, attracted by its stage rather than age-based approach and its emphasis on learning through projects that engage several disciplines together, rather than focusing on one at a time.

But they were last week sent an email informing them that rather than accepting 700 students across all year levels in 2020, which was the intention as recently as January, the school will now only open its doors to 65 new students in kindergarten and years 7 and 11.