A grammar or vocabulary point is first explained and then there are a number of online activies where the blog users can do excercises to test their grasp and understanding of the point in question.
A few weeks ago Warsaw Will, the person behind Random Idea English, published a more than interesting entry about the differences in usage between come, go, bring and take, which is usually a bone of contention for students of all levels.
Drop by Random Idea English and have a go with come, go, bring and take.
