Here is the full list of all 110 School of Dragons achievements.
Make 1 friend.
Make 5 friends.
Make 10 friends.
Create your own Clan.
Join a Clan.
Visit a friend for the first time.
Visit 10 different friends.
Visit 15 different friends.
Visit 25 different friends.
Visit 40 different friends.
Visit 10 different farms.
Visit 15 different farms.
Visit 25 different farms.
Visit 40 different farms.
Play Fireball Frenzy for the first time.
Play Fireball Frenzy 5 times.
Play Fireball Frenzy 15 times.
Play Fireball Frenzy 25 times.
Play Fireball Frenzy 40 times.
Get an A+ on 3 Meatlug lessons.
Get an A+ on 3 Groundsplitter lessons.
Get an A+ on 5 Night Fury lessons.
Complete a Flight Club lesson for the first time.
Get an A+ in Flight Club.
Play single player Thunder Run Racing for the first time.
Complete 10 different Flight Club lessons.
Complete 15 different Flight Club lessons.
Complete 20 different Flight Club lessons.
Complete 25 different Flight Club lessons.
Get 5 A+'s in Flight Club.
Get 10 A+'s in Flight Club.
Get 20 A+'s in Flight Club.
Get 25 A+'s in Flight Club.
Play single player Thunder Run Racing 10 times.
Play single player Thunder Run Racing 20 times.
Play single player Thunder Run Racing 30 times.
Play single player Thunder Run Racing 50 times.
Get First Place in a Thunder Run race 5 times.
Get First Place in a Thunder Run race 10 times.
Get First Place in a Thunder Run race 20 times.
Get First Place in a Thunder Run race 30 times.
Buy 5 decorations for your farm.
Buy 15 decorations for your farm.
Buy 30 decorations for your farm.
Buy 50 decorations for your farm.
Harvest 10 dragon nip.
Harvest 30 dragon nip.
Harvest 50 dragon nip.
Harvest 100 dragon nip.
Harvest corn 15 times.
Harvest corn 45 times.
Harvest corn 75 times.
Harvest corn 150 times.
Catch a fish for the first time.
Win your first challenge.
Harvest 30 pumpkins.
Shear sheep 10 times.
Shear sheep 25 times.
Shear black sheep 10 times.
Shear black sheep 25 times.
Shear black sheep 50 times.
Shear black sheep 100 times.
Collect 15 chicken eggs.
Collect 75 chicken eggs.
Collect 150 chicken eggs.
Collect 300 chicken eggs.
Harvest 90 pumpkins.
Harvest 150 pumpkins.
Harvest 300 pumpkins.
Shear sheep 50 times.
Shear sheep 100 times.
Catch 50 fish.
Catch 100 fish.
Catch 150 fish.
Catch 250 fish.
Catch 10 salmon.
Catch 25 salmon.
Catch 50 salmon.
Catch 100 salmon.
Catch 10 eel.
Catch 25 eel.
Catch 50 eel.
Catch 100 eel.
Feed your dragon 25 fish.
Feed your dragon 50 fish.
Feed your dragon 75 fish.
Feed your dragon 100 fish.
Play with your dragon 10 times.
Play with your dragon 25 times.
Play with your dragon 50 times.
Play with your dragon 75 times.
Visit 10 different Vikings' About Me pages.
Visit 20 different Vikings' About Me pages.
Visit 30 different Vikings' About Me pages.
Visit 50 different Vikings' About Me pages.
Win 5 challenges.
Win 10 challenges.
Win 25 challenges.
Win 50 challenges.
Collect 5 sheep.
Collect 15 sheep.
Collect 30 sheep.
Collect 60 sheep.
Make 20 friends.
Make 50 friends.
Visit 50 different friends.
Visit 75 different friends.
Visit 100 different friends.
Visit 150 different friends.
Fly with Toothless.