The Nurture Assistant is only capable of processing 10 different attachments at any one time because OpenAI which powers Nurture has imposed this limit to keep answers and responses more precise. This is why we limit the number of documents a teacher can upload to their curriculum boundary at any one time.
However, there are a few things you can do to help with this.
You can always remove documents when you no longer need them to make room for new Curriculum Documents
You can combine multiple documents together into one document using a tool such as combinepdf.com (although this may make it difficult for the assistant to choose the right reference you need when generating assessments and feedback).
This also goes for student attachments. Whilst we don't limit the number of attachments a student can upload, the assistant may only be able to process 10 of these at a time.
As Large Language Models like OpenAI improve, we hope that this restriction will be removed in time.