The Tinajeros National High School - Acacia Annex is a public secondary educational institution in Barangay Acacia, Malabon City. It was established through the joint effort of Local Government Officials, particularly the Barangay Council of Barangay Acacia as well as the Parents and the Community Organizations.

Dr. Andre M. Leabres, former Officer in Charge of the Office of the Superintendent of the Division of Malabon City, formally established the school on April 9, 2010 and designated Mr. Juanito H. Gayola as the Officer in Charge.

Here are the School Heads assigned in Tinajeros National High School - Acacia Annex:

Juanito H. Gayola - Officer in Charge from April 2010 to April 2012

Ma. Victoria R. de Gulan - Principal IV from May 2012 to August 2015

At present, Tinajeros National High School - Acacia Annex is now under the leadership of Fortunato B. Abude with 8 newly hired teachers to handle its Senior High School Program while 30 teachers are designated for the Junior High School. For the School Year 2016 - 2017, Mrs. Mary Ann R. Dy was assigned as Assistant to the Principal whom was tasked to oversee the operation of the school as a whole.