While learning, don't forget about grammar. I've found some useful exerсises, appropriate for all age groups. With language changing as new elements are introduced, is grammar really that important? Academically speaking, there are certain parts of the English language and grammar that wasn’t acceptable years ago. Now, however, these changes are widely used and interpreted as correct.
Grammar is very important, no matter how much the rules change, as it is what makes it possible for us all to communicate and understand what we see, and what we say. Click here and here