Vocational HS can be tough. Using material that they may use in their future jobs is a good idea. My school works with electronics, architecture and construction- a few things a little more technical and I haven't been encouraged to touch on them at all. I think in part because they are technical and my CT doesn't know that vocab. My students are also super low I don't think they would care.
It is hard to come up with ideas when I don't know your level of students, but here are a few quick ones I came up with:
Hospital management and Nursing you can easily do extra health vocab.
Hospital management-
Nursing- play dr.- have 'symptoms' and work on diagnosis in English. This could easily work into being skits.
Design- (what kind?)- have them design a something and present it to the class. Have a lesson on art- give them some design ideas.
Finance- Aqvm's idea of the graphs could be good.
Finance and hospital management- can do some sort of money activity. costs and budgeting, risks of investments. Somewhere on Waygook there was a natural resources exchange (currency) between countries.
Current news is always a good idea.
I had a global politics class at university where we had a real life simulation activity- different countries and showing how one move by one would trigger others around the world to respond. There were things announced- as in media, countries could have press releases. Or could pass a paper to the prof (this would be a CIA type of move)... Anyways a bit higher level, but the real life simulation was a really good way to apply the materials learned. After test time the students do not care about much. So having activities over lessons may work better.
