Other factors that affected wellbeing were juggling multiple internal assessments at once as well as extracurricular activities.
However, one concerned parent said the proposed programme felt under-planned and parents were not properly consulted.
He believed dropping assessments and examinations would remove the method of objectively measuring the growth and success of pupils.
Although NCEA level 1 was not compulsory, he thought it was important that pupils be exposed to the system before level 2.
"I am concerned that this will be a retrograde step for a school that previously prided itself on academic excellence. Now it seems to be satisfied with mediocrity."
Maw declined to comment on the individual concerns raised by the parent.
NCEA level 1 resulted in many hours being focused on assessment and fewer on learning, she said.
By removing most NCEA assessments, the school could increase teaching time and
better prepare pupils for year 12.
There had been two rounds of parental consultation and parents were welcome to contact her with feedback, Maw said.
The process had been long and was not taken lightly.
"There has been robust and helpful discussion which will inform further development of our proposed year 11 programme."
Change could be difficult, but the programme was based on sound educational practice.
The document provided to parents said 52 per cent of pupils believed only NCEA levels 2 and 3 were necessary.
NCEA level 1 did not provide entry into tertiary study or training, whereas NCEA levels 2 and 3 did and were therefore more important.
Parents and pupils would still be given timely and specific feedback on their learning so they were well informed of progress and next steps, the document said.
There would still be some exams.
If a pupil left school to enter the workforce it would not matter whether they had level 1 NCEA or not, the document said.
New Zealand Qualifications Authority deputy chief executive assessment Andrea Gray said last year there were 19 secondary schools nationally with similar approaches to NCEA level 1 as the one proposed by St Hilda's.