How did my school find out i called myself off even though i sound exactly like my dad?

I was admitably "playing hooky" because both of my parents went to work so i was like "wat the hell i sound like my dad enough" . then i call myself off etc etc.. 3 hours later my dad calls. "Hey what the hell. Whyd you call your self off school saying your me?" Im sitting here like, are the teachers at my school ******* jedi masters?