https://www.turtlediary.com/games/language-arts.html
There are many language art games in this website. Use the search bar to help you find the grammar topic you want to practise. Grammar topics include adjectives, prepositions, nouns, parts of speech, etc.
https://www.khanacademy.org/humanities/grammar
There are free lessons with practice on different grammar topics here. If you sign up for an account, the site will be able to keep a record of your progress for you.
http://web2.uvcs.uvic.ca/courses/elc/studyzone/grammar.htm
Grammar lessons and exercises for all levels
http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos
Practise and improve your grammar by watching grammar videos in this website. The videos show the grammar being used in natural conversations. There is an explanation of the grammar point and exercises for you to check how well you can use the language correctly.
https://mocomi.com/learn/english/grammar/
The English grammar is explained in simple English here. You can download the notes for revision.
http://www.eslgamesworld.com/members/games/grammar/
Revise your grammar by playing online games here.
http://www.englishmedialab.com/grammar.html
More interactive online games and exercises for you to practice your grammar.