sˈɪns ðˈɛn, ɡɹˈeɪd twˈɛlv wʌz ˈædᵻd ænd ɡɹˈeɪd sˈɛvən wʌz dɹˈɑːpt tə mˈiːt ðə pɹˈɛzənt ˈeɪt dˈæʃ twˈɛlv stˈændɚd fɔːɹ hˈaɪ skˈuːlz.
Since then, grade 12 was added and grade 7 was dropped to meet the present 8-12 standard for high schools.