Complex sentence: The school was led by Mrs. Maria Theresa S. Villanueva from 1972 until 1974 and classes were held in the Amlan Central Elementary School for a few years because there was still no lot for the high school.
Split into simpler sentences: The school was led by Maria Theresa S. Villanueva from 1972 until 1974. Classes were held in the Amlan Central Elementary School for a few years because there was still no lot for the high school.