EVALUATION OF REPETITION, READING FOCUSED ON CORRECTION, AND LEARNING OF PHONEME-GRAPHEME CORRESPONDENCE OF THE DIPHTHONGS /EꞮ/, /AꞮ/, /ƆꞮ/, /AƱ/, /OƱ/ AS CORRECTIVE TECHNIQUES OF THE PHONETICS USED AT SCHOOL PIO XII FOR THE EFFECTIVE PRACTICE OF THE ORAL ENGLISH LANGUAGE IN SIXTH GRADE DURING THE THIRD QUARTER OF 2021.