The assessment can be as long as two pages but most are just one page.
The HSE have recently published case studies to help. I have attached case studies for both Primary and Secondary schools. I have also put the link to the web page here as well.
Remember when ever trips are arranged you must provide your own first aid kits for the trip.
After each course I provide I get a number of requests for the First Aid Needs assessment sheets.
There are two files available both PDF documents that you can download and use.