need tips to improve

hii! so im a secondary school student taking triple pure science + history elective + amath. my results rn are really inconsistent throughout term 1-3 and i really dont know how to make them more consistent... so far, the only subject thats improving for me is amath, but all the others are dropping/ super inconsistent. (especially bio, emath, hcl)

anyways, i would really love it if i could get some tips with improving on my subjects. i really want to improve and get better grades instead of them literally going 📉📈📉📉📉 😭😭 thank youu