Upper-intermediate
Follow the plan suggested by Oxford, that's it:
https://www.oxfordonlineenglish.com/free-ielts-preparation-lessons
80 (!) sites - and apps - explained: https://vc.ru/education/704225-80-resursov-dlya-podgotovki-k-ielts
https://ielts.app/
https://learnenglish.britishcouncil.org/ielts/free-online-courses-understanding-ielts
British Council sample IELTS practice tests (free): https://takeielts.britishcouncil.org/take-ielts/prepare/free-ielts-practice-tests
Public IELTS scoring schemes for speaking and writing: https://takeielts.britishcouncil.org/teach-ielts/test-information/assessment
Essay Problem essays topics: https://www.ieltsbuddy.com/problem-solution-essays.html
New English_File upper
Listenings
https://www.youtube.com/watch?v=MLD40QnAEos&list=PLxknN0YWH7bCORypWCRCW70nYRN2SE1DO&index=2
https://www.english-grammar.at/online_exercises/tenses/at055-all-tenses.htm
https://usefulenglish.ru/grammar/
WRITING
Writing a probem solution essay - https://www.youtube.com/watch?v=QjdPaYn-f40
Clearly define the problem.
Address every question in the task: causes of problem, solutions, state your opinion
4.
Writing introduction - 3 sentenses: general lead-in, stating a problem, giving opinion
Writing body 1
General mentioning a few causes. Cause 1 + example, Cause 2 + example - 5 sentences.
Writing body 2
General lead-in of solutions. Solution 1+example, Solution2+example - 3-5 sentences.
Writing conclusion
Summirized conclusion. Statememnt of opinion.
https://quizlet.com/de/645145804/hse-english-exam-flash-cards/
IELTS VOCABULARY in diagrams (10 topics)
https://www.ieltsadvantage.com/2015/03/05/most-common-ielts-writing-task-2-topics/