trước hết là viết đề sai kìa, phải là "learn speaking" nhé bạn.
so...
In my opinion, learning speaking at school is a great way to develop my speaking skills.
First of all, at school, we have teachers. The teachers will correct our pronunciations, grammars, etc. helping you give your best improvements of your speaking!
Secondly, you can meet to "pros" and ask them to help you with your English. They would happy to help you! Don't forget to give them some compliments (not to much) so they would be interested in helping you, making real improvements to your English. Make sure you get to the right "pro".
Next, practicing is important and what is better than practicing speaking English with your friends and classmates. It helps you build your confidence in communications. You and your friends can also correct each other's mistakes!
Last but not least, learning speaking is a cool way but there are many ways of learning: watching English programs, flims, watching TED-ED things or just simply Netflix. It's up to you. But talking to your teachers, the “pros”, your friends is a truly practical way to improve. It’s the base of dealing with your speaking tests
To sum up, it's not difficult to learn speaking at school, it's just how you take advantage of it.