Some of you may already know about these - from the 'Learning English Teens section of the British Council's website...if you haven't seen them yet, they're well worth checking out - I think they're brilliant. Basically, they take grammar items and show how they're used in real life, illustrated through simple cartoons based around a situation.
There's some explanation of the grammar points and links to worksheets based on the language used in the clip.
The videos look like this:
There are something like 30 different videos to look at:
And the worksheets look like this: