NCEA exams begin on Monday morning with one of the biggest exams - level one English.
More than 143,000 people will sit 120 NCEA and scholarship exams during the next four weeks.
The Qualifications Authority says students should make sure they have a quiet place to study and take regular breaks. It also suggests parents double check their preparations.
Students will be able to access NCEA results on the NZQA website in January. Scholarship results are released in February.