It's easy to read something (e.g. a lesson on this site) and think that you understand it. But 'understanding' is not the same as 'using'.
Can you really USE everything that you have read?
Can you use it correctly, without any mistakes?
Look again at yesterday's lesson about 'lead to'. I'm sure you understand these words, but not many students are able to use them accurately. This is important because it could make the difference between a band 6 and a band 7.
Try to think about these steps when you are studying:
- Understanding a word is only the first step (e.g. 'lead to' means 'cause')
- The next step is seeing how words are used (e.g. 'lead to + noun')
- Try to use what you have learnt
- Ask a teacher to correct your work
- Learn from your mistakes