Now you need to start thinking about what you are going to say and where to find the information. There is a wealth of information available to forklift instructors nowadays and it's up to the instructor where it comes from but the most common sources are listed below.
Own knowledge! Start with what you already know. It may sound obvious but as someone who has presumably attended a forklift instructor course you probably know more than you think.
Other people's knowledge. Don't be afraid to ask! Other instructors, supervisors, forklift engineers etc.
Check out the HSE website. It's full of information. Sign up to their free email newsletter.
The internet is a great source of information but don't forget that anyone can put anything on line so be careful about accepting things without verification.
Use manufacturers leaflets and driver's handbooks that come with the truck. If they have disappeared, get new ones.
There are many trade magazines that have information on accidents involving forklifts, prosecutions and the like.
Feel free to use this website - that's why I wrote it. If you are searching for something specific only use one or two words and spell them correctly! I get a list of searches every week and some spelling is appalling. No wonder a computer can't find it! (Rant over)