1. Explain it simply
为了 + goal, then the main clause: 为了 names the purpose.
Put 为了 at the very front of the goal clause, before the main action.
The goal comes first; the result follows: 为了健康，他每天锻炼。
为了 attaches to the goal, never to the action verb.
2. Show examples
为了健康，他每天锻炼。
Wèile jiànkāng, tā měitiān duànliàn.
In order to stay healthy, he exercises every day.
goal first
为了考试，我每天学习。
Wèile kǎoshì, wǒ měitiān xuéxí.
In order to pass the exam, I study every day.
为了 + goal
为了买书，她去了书店。
Wèile mǎi shū, tā qùle shūdiàn.
In order to buy a book, she went to the bookstore.
purpose then action
为了学好中文，我常常练习。
Wèile xué hǎo zhōngwén, wǒ chángcháng liànxí.
In order to learn Chinese well, I practice often.
in order to
3. Share a tip
Keep 为了 at the front of the goal clause - it names the purpose, not the action.