Good-bye summer. Hello books (or iPads or Kindles)! Time to go back to school.

Another school is in session: The school of hard-knocks in Tetris Arena. This week, you can teach your opponents a lesson and reap double the rewards with the Speed Up item which is HALF OFF in the Tetris Friends Shop. Double your XP after every match for only 5 Rubies.

Want to EARN FREE RUBIES? Click to see all the offers available in your area!