The Post Primary Teachers' Association wants to ban streaming in schools by 2030.
Streaming is grouping students together based on their perceived ability.
Auckland's Sacred Heart College principal Patrick Walsh told Roman Travers international evidence proves it doesn't work, even for top academic students.
He says it does have a detrimental effect on Māori and Pasifika students in terms of self-esteem and life opportunities.
LISTEN ABOVE
Take your Radio, Podcasts and Music with you