I appreciate that mia. hahaha! pero busy kasi ko sa mga raket ko at graduate studies kaya i prefer not to be employed as of the moment. hahaha!
Anyway, if yung content ng survey questionnaire niyo ay tungkol sa absenteeism at school, the best person to validate that is the school psychologist or guidance counselor. Pero in general, pwede din namang mga teachers siguro kasi education pa din naman ang context at since we are professional educators, pasok pa din naman siguro kami as expert pool.
In terms of reliability, it’s best to test your material against a previously validated material regarding absenteeism. Ngayon, kapag correlated yung results then reliable na yan. By the way, isa ito sa gamit ng review of related literature, ang maghanap ka ng mga valid instruments na pwede mong itest yung instruments mo.