Many Students at High School in QC Can’t Read, How Did They Pass Elementary?

Excerpt
Teachers at a high school in Quezon City are having problems about a good number of students who don’t know how to read, can’t even recognize basic alphabets and numbers, and don’t have any idea about basic colors and shapes! How did these kids even pass elementary?
Sauyo High School (formerly Pasong Tamo High School) is a public high school in Quezon City, Metro Manila. Teachers at the said school were shocked to find that there are so many students in their class who shouldn’t be in high school at all.