Hi,
Here is my lesson plan for American vs UK English. I borrowed a little from other users, but mostly it's my own work.
The lesson plan should explain what to do, but if you need any clarification let me know :).
Also, I originally embedded a video of the Youtube "star" Dave talking to a British friend of his, but the file was too large so I've just included the link.

Good job on this PPT. I will use this for my after school class. Thanks for sharing 

No problem. Let me know how it goes.

I forgot to include all the cards for the final game. I've edited it so there are cards for question 1.

I'm glad you found it useful. I'm not a huge fan of Dave, but I also used one of his videos in the class. The kids seemed to enjoy his video though.

No way are chips (BrE) the same as French fries http://www.theregister.co.uk/2015/06/08/chips_acrylamide_warning/
I did my own BrE v ame lesson for my adult students but I did Taboo at the end instead of a role play.

Are you just being pedantic? If you served a plate of British chips to Americans and asked them what they were, they'd say they were french fries. Admittedly, I sometimes refer to Mcdonald's chips as french fries because they aren't as good as regular chips, but I think most people would agree that french fries and chips are synonymous.
The roleplay was the second to last activity. At the end I did a speed quiz where they have to run and find the answer on a card stuck to the back wall. Taboo is always a good game to play, but I think I've overused it in previous classes this semester.

Here's another video on the main differences between British English and American English pronunciation.
https://www.youtube.com/watch?v=1AGFmgmcmj4&index=16&list=PLl4RI1pH-8dHcFmJQd4M9bp4rtsHINzWg

sorry once again but chips (BrE) are chips and French fries are French fries (Yeh the McDonald's stuff). It may well be an American calls chips French fries but a brit like myself doesn't and wouldn't innit. They're a totally different look and taste. It might be ok to use them "synonomously" as you put it but students need to be told what a real chip is IMO. It's more fun that way. For young kids though, just say theyre the same innit.

I mean that's a personal view, but I'm teaching what Americans would say vs what British people would say, so Americans would call chips french fries. I have to generalise a little. It's always up to you if you want to give across your personal opinion about what exactly these words mean to you, but by definition these are the same thing. Personally I wouldn't want to waste too much time going into the intricacies of the exact differences between French fries and chips according to everyone in the UK, particularly as I think it would just end up the confusing the students more.

Also, gravy on fries/chips is good once a year, any more than that it is utterly disgusting. Good chips/fries need no sauces, save for perhaps a little vinegar.

I actually agree.  Once (maybe twice if spread out) a year for chips and gravy is enough.  Get a good chip, like those back home, some salt (or maybe even chicken salt if you're feeling ambitious), vinegar or a squeeze of lemon is all you need.  Sauce is not needed.

And I wouldn't waste time telling students the difference between chips and french fries in the course of a general lesson, unless the title was 'The Pedantic and Mundane Differences between two forms of English'.

And I wouldn't waste time telling students the difference between chips and french fries in the course of a general lesson, unless the title was 'The Pedantic and Mundane Differences between two forms of English'.

One lesson happened to be an opportune time to show the kids videos of foods, so one of the videos I chose was about how different countries served fries.  I told them about chips and french fries for fun, not that I expected any of them to remember that tidbit, of course.  Ah, any chance to show a food video gets us all drooling!

This is great materials to teach the difference between two countries. Thank you