Catherine,
For each subject in Year 10 you will need a seperate page with an indenticle template to your Triple Science template. e.g. English, Maths etc. These have to be related to the subjects that you set up in your Comment banks for year 10. In your case your Year 10 comment bank has to have all the subjects with the sub sections General Comment and Classwork/Homework/Behaviour. Once your comment bank is set up correctly you can then embed the correct tags for the correct subjects. On each of these pages you can have their course descriptor. You also need to start each subject page with the report open tag and finish the page with the close report tag.
When it comes to collating the reports as long as you have set up all your subjects in the same comment bank they will automatically assign them to the student. this way you only have one sessions per year group which is attached to one comment bank, using one large template.
You will need to create a seperate template for each year group as well. TO do this clone the one you have and rename it Year 7, year 8 etc.
Hope this was in some way useful.
Mike