I taught English as a foreign language for almost 4 years. As it’s the aviation industry, there is a lot of literature and aircraft and all sorts of manuals, websites out there, newspaper articles etc. If you’re strictly talking vocab, you may find something useful from these as discussion topics or starter conversations.
If you have an hour or two each time with the learners, it’s useful to have a warm up before starting on the main topic. It puts people at ease and ensures everyone is present and not tying up loose ends before heading to you.
Have something as a back up, which can be used if things are getting a bit tough or even as consolidation if you base things around the vocab. You can come back to your plan next time.
We sometimes played silly games as long term learning can get boring for everyone. With one company, I had same class for years. The one, where another person sticks a word to your forehead and you have to guess who / what they are is fun. You then go round the table with the person asking questions trying to guess who / what they are. If you tell them it needs to be a word they’ve learned or a topic of work, they’d be practicing what you’d already taught. And remember to also include yourself in the game. But if you’re struggling, better to play any game than to feel out of your depth so have a couple to hand in your teaching resources. I also bought board games, which don’t take up too much time, something that can be played for about 20 mins or less like Pass the Bomb to use for fun every now and again.
They also may be nervous, as might you be too. So even just basics like introducing themselves the first time and their job title and one thing they like best about their job will help things flow.
You should also ensure that they know these classes are serious and to get the best out of it timings are important. It’s very different giving training to colleagues than having it from somewhere outsourced. So you may need to be careful with the games you may choose. I was in Germany playing these games with high ups in the company btw and it all went down well. Maybe it was because I was confident and positive in what I did. And that is important to trust yourself and to have a back up if things go wrong or if everyone is tired / demoralised etc so you can just say, ‘you know what, let’s pick this up next time. Let’s play x.’
Once you get in the swing of things, it’s possible to get them creating short presentations, have pretend phone conversations or meetings and allocating them job roles. Either internal or a mixture of external and internal roles with someone playing a customer, supplier etc. This extends learning and you mix things up rather than being just solely focused on you. Any pair or group work is good. I appreciate there aren’t that many people in the company and it depends on if their levels are relatively similar.