CREATE TABLE table_12148147_2 (third_year VARCHAR, first_year VARCHAR)
SELECT COUNT(third_year) FROM table_12148147_2 WHERE first_year = "Pag-unawa"
ปีที่สามที่พัคอุนาวาเรียนในปีแรกมีกี่วิชา?
How many classes are taken in the third year when pag-unawa was taken in the first year?