Pre ADR Course Reading?

To be honest I asked the same question knowing i was going to be doing an adr course as soon as lockdown was over. Once i did the course i realised that there is nothing that i needed to bone up on or learn before hand.

At the beginning of the course we were given a folder with all the relevant information in and at the end of the day we were given a list of questions on what we had covered that day. we then went over all the questions we had done the next day so all the important information was drummed into us.

if you really want to bone up on a single aspect i would suggest learning the different classes and the signs for them including classes 1 and 7.