Some useful material.

Vocabulary:
IELTS高分字彙(眾文)
CHECK YOUR ENGLISH VOCABULARY FOR IELTS by Rawdon Wyatt
https://ieltsliz.com/vocabulary/
https://www.ieltsspeaking.co.uk/ielts-vocabulary/


Speaking:
Engoo: 2 / week
里茲螞蟻
https://ieltsliz.com/ielts-speaking-free-lessons-essential-tips/

Self-praticing:
1.Describe an object (a gift, something you use etc.)
2.Describe a person (someone you admire, a family member etc.)
3.Describe an event (a festival, celebration etc.)
4.Describe an activity (e.g. a hobby)
5.Describe a place (somewhere you visited, a holiday etc.)
6.Describe your favorite (book/film/advertisement/website)


Writing:
https://ielts-simon.com/
https://www.ielts-blog.com/ielts-writing-samples-essays-letters-reports/
https://ieltsliz.com/ielts-writing-task-2/


Listening:
BBC learning English
Ted-Ed/Vox/BBC Ideas
The Economist/BBC Newsnight/NowThis World

Reading:
Cambridge: 11-14