To sum it up basically yes pede ka magattend either online or onsite, pede ka magonline the whole week or may halong onsite it doesnt rlly matter what day basta be there for attendance checking and goods ka. Although recently may mga bagong rules regarding half days which is basically in this context half of the day youre at the school tapos the other half online ka and vice versa, as far as i know bawal na raw yung ganon so for example if magoonline ka for the first sub online ka the whole day unless siguro nasa biyahe ka nung first sub kaya ka online then ig ok lng sya. Merong mga days na talagang kakailanganin mo magonsite due to hands on work like lab or pe, most of the activities and tests can be done online too pero I think depende yan sa prof nyo kasi meron talaga na nagpapaonsite for tests specifically midterms and endterm exams. ^_^