For example Biology, Chemistry, Physics, Earth and Space Science, and Science would be replaced by a single subject, Science; and Economics, Business Studies and Accounting would be replaced by Commerce.
The separate subjects Physical Education and Health would become a single subject, and
History and Classical Studies would be replaced by History.
Feedback on the ministry's proposed list of level 1 subjects closes on April 20.
MacGregor-Reid said more than 1000 achievement standards would be rewritten as part of the overhaul, which was announced by the government last year.
She said it would take five years to make the changes and no changes would be made before 2021.
Primary and intermediate school principals last year opposed suggestions the new NCEA literacy and numeracy tests could be made available to students in Years 7-8.
The tests are being introduced after research found some students with NCEA level 2 failed a test of basic adult literacy and numeracy.