My child just came home and told me that she skipped 7th period like that's OK or something. How do I handel this one??

Don't get her out of any trouble she may be in for it.She has to accept the consequences.Skipping in my day meant in school detention.
I would ask her why,is she having a problem with a teacher or classmate or she just felt like it.
I would ground her for the day.
Tell her if she hadn't told you and you just found out from school,the punishment would be worse.She is getting off easier for telling the truth!