Have you had a look on the TDA website? www.hlta.gov.uk This shows you what HLTA standards you will need to meet and gain evidence for. You may also like to research some education laws and policies such those based on SEN. Be aware of child protection and health and safety records. Record any pupil racist, sexist,social exclusion and behavioural incidents you may deal with. Write down what happened and how you dealt with them. If you have any home/school correspondence then photocopy them as potential evidence. You have to show how you have enhanced pupil learning so 'before and after' evidence of pupil work is useful. See if you can perhaps accompany some pupils on an out of school trip/event. If you help with the classroom environment, such as displays etc, take photos of your work. Like wise with any resources you may make. Also photocopy any performance management documents. Be aware though, that when you undertake the HLTA training the tutors may ask for recent evidence (within the last year/18 months of starting the course) but will except some later dated evidence if you are struggling to meet criteria. Good luck!