Tihu College has an Accredited Study Centre (ASC) of Assam State Open Schooling (ASOS) under AHSEC to communicate its HS course. The mission of ASOS is to provide education to all with special concern for girls and women, rural youth, working men and women, SC and ST & other disadvantaged persons who because of one reason or the other could not continue their education with the formal system. Without upper age limit for admission, a learner can choose any subject combination from a list of subjects offered as per the criteria given in the scheme of studies in either English or Assamese medium.