Ten by Ten simply means you have 100 pics on news and events that are happening (or have happened) in the world. Using
Ten by Ten gives people the chance to explore the current news as well as the news of the past few years. All you need is 5 minutes to read at least the headlines.
Self-study activity:
If you wish, and you are studying with an English-speaking friend, you can discuss what the article is going to be about after reading the headline. You also have the option of reading the news items in full.