I am a private tutor teaching GCSE English Language to three 15/16 year olds who are working at a level 2/3. I am going through the basics of grammar (capital letters, simple sentences, complex sentences, etc). Can anyone please give me some advice on how to approach this? I feel out of my depth. Are there are textbooks you could recommend? i often find that they forget to apply what they have learnt in their sessions with me - they don't apply the rules although they have been taught about them and completed worksheets. Any kind advice would be gratefully received.