Ireklamo guro iskuwelahan, may kinakasama di kasal, may anak sa pagkadalaga, unwed born out of wedlock

From the perspective of the Labor Code, ang immorality ay hindi just or legal cause for termination of employment. Iba na siyempre kung ang contract of employment ng guro ay may stipulation na siya ay dapat above moral reproach. Kung may employment contract ang guro at naka-saad sa employment contract niya na dapat ay may standard of morality siyang dapat na i-uphold, then, if he or she fails to live by that moral standard s/he had agreed to, that is a cause for the termination of the contract of employment.
Does her "immorality" prevent her from being an effective teacher? Does this set a bad example to her students? ARe her students morally corrupted because of this? Those are questions you would have to answer. YOu can file a complaint with the management of the school. It is only the school that can terminate her employment.
On the other hand, if she is a single mother, and you succeed in getting her terminated from her employment, she will have no means by which to support her children. She may have made a mistake and committed an immoral act -- but in censoring her for her immoral act, you are also punishing her children -- have you thought about it this way? Anyway, you cannot file a case to remove her from her employment. That is purely the prerogative of the school that hired her. What you can do is remove your child from that school.