To do a back handspring you should be able to do a bridge. It will help if you can do a bridge kick over, too!
Start while standing. If you have a jump before, it will be really hard to get rid of it.
Go into a chair position.
Spring up! Don't be afraid of going backwards! Remember to stay straight!
In the middle to a nice straight bridge. Prepare to land on your hands! Point your toes!
In the middle to a handstand. Keep your arms straight. If you can't support your weight, you can practice pull ups and jump into handstands.
Now swing your legs over.
Swing up! Now you've done a back handspring!
The creator of this guide has not included tools