This study aimed to determine the perceived stress of teachers implementing K-12 in Arellano University – Main and Ramon Magsaysay (Cubao) High School. The researchers used purposive sampling to know the perceive stress of secondary teachers and to come up with a propose wellness program. The researchers used the NIOSH Generic Job Stress Questionnaire where the researchers only included nine factors to measure the perceive stress of the respondents. A total of 28 respondents received the questionnaire, 13 respondents were from Arellano University – Main and 15 respondents were from Ramon Magsaysay (Cubao) High School. The findings of the study reveal that there is no significant relationship between the demographic profile of the respondents and the factors of the NIOSH Generic Job Stress Questionnaire. Therefore, the implementation of the K-12 program in Arellano University – Main and Ramon Magsaysay (Cubao) High School has a low perceived stress in relation to the demographic profile of the secondary teachers.