Yes!! I get A's in politics and am planning to take it at uni, I am also yr 13 so I think I can help!! I reccomend reading the news headlines every day, whilst your brushing your teeth, making breakfast etc, if reading isn't your thing, put the news on in the background. I reccomend reading two different news sources to balance out the political spectrum so I read the telegraph and the guardian but the bbc is pretty good too. REVISE KEY WORDS!!!! they will really help in your exams, especially when the question has phrases you may not be aware of. I tend to reccomend making an essay plan every day (doesn't need to take ages, try get it done in 20 min) this means you can switch around on different areas of the course. I do Edexcel so if you are doing that then pick 2 ideologies to study and study them HARD im doing socialism and conservatism, (and feminism) I have read extracts from the works of the key thinkers books etc read into people you like about their political allignment. apart from that, general religion and wider reading of specific sections work quite well, if you have questions please don't hesitate to reach out, hope this helps <3333