1. Khan Academy

   • Website: Khan Academy

   • Features: Comprehensive lessons on grammar, reading, and writing for all levels, with interactive exercises and videos.

2. British Council Learn English

   • Website: British Council Learn English

   • Features: Wide range of resources, including grammar lessons, vocabulary exercises, and practice tests for all proficiency levels.

3. Cambridge English

   • Website: Cambridge English

   • Features: Offers a variety of resources, including practice exams, grammar exercises, and vocabulary activities for different levels.

4. Memrise

   • Website: Memrise

   • Features: Uses spaced repetition and mnemonic techniques to help learners at all levels remember vocabulary and grammar rules.

5. Quizlet

   • Website: Quizlet

   • Features: Flashcards and study sets created by users on a wide range of topics, including English vocabulary and grammar for all levels.

Specialized Learning

1. Grammarly

   • Website: Grammarly

   • Features: Advanced grammar and writing tool that provides real-time feedback and suggestions for improving written English.

2. Lang-8

   • Website: Lang-8

   • Features: Allows users to write journal entries in English which are corrected by native speakers, ideal for improving writing skills.

3. italki

   • Website: italki

   • Features: Connects learners with native-speaking tutors for personalized language lessons, suitable for all levels.

These websites offer a variety of tools and resources tailored to different learning styles and levels, making it easier for students to improve their English skills progressively. Whether you are a beginner or looking to refine your advanced English, these platforms provide the necessary support to help you achieve your language learning goals.