Dr McNeill surveyed 405 primary school teachers from a variety of regions and schools of varying socio-economic status on their spelling instruction and assessment practices.
Teachers struggled to find time to teach spelling within the curriculum and lacked professional knowledge about English language structure. "Many teachers also reported that their initial teacher education programmes did not provide them with adequate training in this area."
Dr McNeill said teachers needed to work on providing explicit instruction in spelling.
Working on language structure awareness helped vocabulary development and reading skills, she said.
New Zealand children were struggling more with writing than reading - with 32 per cent performing below national standards.
Although spelling was only one component of writing development, accurate and fluent spellers had more cognitive resources to focus on higher-order aspects of writing, Dr McNeill said.