Here is an interesting info-graphic that shows which languages are spoken most throughout the world.
Can you design a bar chart or a pie chart to show this information?
How about carrying out a survey to find out which languages are spoken in your class/course or college? You will need to plan it carefully first, working out how to collect the data. Then analyse your data, putting it into tables. Finally present your data using graphs and charts in a format that will make people want to read it.