Language Sub Skills
The letters in PMI stand for the three sections of the PMI chart: Plusses, Minuses, and Interesting things. The I can also stand for Implications on some topics.
Type in your topic.
Spelling
The forming of words from letters according to accepted usage : orthography. The way in which a word is spelled.
https://www.gamestolearnenglish.com/spelling-bee/
https://www.aaaspell.com/
https://www.spellingcity.com/games/spelling-testme.html
Vocabulary
Add the interesting things or implications that come along with your topic.
Vocabulary refers to all the words in a language that are understood by a particular person or group of people.
http://www.englishvocabularyexercises.com/general-vocabulary/
http://www.eslgamesworld.com/members/games/vocabulary/index.html
https://www.learnenglishfeelgood.com/vocabulary/
Grammar
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The whole system and structure of a language or of languages in general, usually taken as consisting of syntax and morphology (including inflections) and sometimes also phonology and semantics.
https://www.englishgrammar.org/exercises/
https://www.perfect-english-grammar.com/grammar-exercises.html
https://learnenglish.britishcouncil.org/english-grammar-reference
Pronunciation
Add the advantages of your topic.
Definition
The act or result of producing the sounds of speech, including articulation, stress, and intonation, often with reference to some standard of correctness or acceptability.
https://www.oxfordonlineenglish.com/free-english-pronunciation-lessons
https://speechling.com/es/
https://pronuncian.com/