Use it to teach Kasaysayan ng Lipunan (Social History). Have students analyze the lyrics of "Bayan Ko" versus "Bagong Lipunan" (the Marcos-era propaganda song). Compare the historical context using the songbook's appendix.
Bayan Umawit songbook is the definitive collection for Catholic liturgical music in the Philippines, published by the Jesuit Music Ministry (JMM)
Because the PDF is searchable (unlike a physical book), a user can type "climate change" and instantly find the two new songs added about the West Philippine Sea or mining in Palawan. This digital agility keeps the protest music relevant.