Since the 1st of May 2016 all students doing a Level 1 Instructor course (all disciplines) are required to complete a child protection course. This can be done either face to face through an organised course or via an online course such as the ones highlighted on this page.
When choosing a course please bear in mind where you intend to work as an instructor. For example the first link is to an Irish based course (TUSLA) while the others are UK based. As such the content will be relevant to that country.