Angry Birds Seasons lets you lob birds at pigs while simultaneously celebrating international holidays.

The latest update is something of a downer. It reminds us that summer is coming to an end and we'll all be going back to school soon.

But, don't get too depressed - this bumper Seasons pack might just cheer you up. As you play through these 20 school-theme stages, you can exact your revenge on the dreaded educational establishments by slamming angry birds into them.

Stuck? Watch the video walkthroughs below to see the pros in action.

Back to School. Level 1-1:

Subscribe to Pocket Gamer on

Back to School. Level 1-2:

Subscribe to Pocket Gamer on

Back to School. Level 1-3:

Subscribe to Pocket Gamer on

Back to School. Level 1-4:

Subscribe to Pocket Gamer on

Back to School. Level 1-5:

Subscribe to Pocket Gamer on

Back to School. Level 1-6:

Subscribe to Pocket Gamer on

Back to School. Level 1-7:

Subscribe to Pocket Gamer on

Back to School. Level 1-8:

Subscribe to Pocket Gamer on

Back to School. Level 1-9:

Subscribe to Pocket Gamer on

Back to School. Level 1-10:

Subscribe to Pocket Gamer on

Back to School. Level 1-11:

Subscribe to Pocket Gamer on

Back to School. Level 1-12:

Subscribe to Pocket Gamer on

Back to School. Level 1-13:

Subscribe to Pocket Gamer on

Back to School. Level 1-14:

Subscribe to Pocket Gamer on

Back to School. Level 1-15:

Subscribe to Pocket Gamer on

Back to School. Level 1-16:

Subscribe to Pocket Gamer on

Back to School. Level 1-17:

Subscribe to Pocket Gamer on

Back to School. Level 1-18:

Subscribe to Pocket Gamer on

Back to School. Level 1-19:

Subscribe to Pocket Gamer on

Back to School. Level 1-20:

Subscribe to Pocket Gamer on