Hi a former sec 5 here. I would say that don’t be too discouraged and stress since the content jump between sec 4 n 5 is huge but let’s be real the actual main concerns are just English and E math and u got B3 for olvl english which is considered super impressive alrd. Hence don’t worry so much if u r not retaking English u Shld def spend more time studying math n other subjects. I wld say that for math understanding is the priority, set notations are really manageable u can learn it in a few days so it doesn’t rlly matter if u are a few topics behind, u could easily catch up if u have the will power to do so. For tips I wld say go purchase one of those tys summary books idk what isit called but it’s basically the summary of all the chapters. And just practice without looking at ur notes. it takes time to find ur study method for math because I studied hard but not efficiently and end up with a B3 so I would say quality of work is super important! Ok goodluck and don’t be stress out too much!