Can I boost my grade significantly in a month?

Just today my economics teacher decided to mention that we have a macroeconomic mock “sometime in June”, we had our Year 12 mocks back in March and my grade for economics was an E (I know, bad) but I’m curious if I can manage to get a lot better in only a month. Any tips?

What exam board are you, just out of curiosity? If you knew the content but couldn't apply it to questions, try doing as many questions (past papers) as you can during this time, try and get your teacher/classmates to see them so they can give you advice on structuring answers. If you knew how to answer the questions but not the content, then I would use a YouTube channel such as econplusdal to quickly get you through the content and then do questions/do them in conjunction, using the videos to help you answer the questions.