Creating a comprehensive spoken English training schedule over 90 days requires a structured approach that covers various aspects of language acquisition. Keep in mind that consistent practice, exposure, and gradual progression are key. Here's a sample schedule:

Weeks 1-2: Foundation and Basic Vocabulary
Day 1-7: Introduction and Pronunciation

Day 1-2: Introduction to the course, setting goals, and understanding the importance of pronunciation.
Day 3-4: Practice basic phonemes and sounds of English.
Day 5-6: Focus on common pronunciation challenges for non-native speakers.
Day 7: Review and practice pronunciation exercises.
Day 8-14: Basic Vocabulary Building

Introduce essential everyday vocabulary (numbers, colors, greetings, etc.).
Use flashcards, visual aids, and quizzes to reinforce vocabulary.
Practice pronunciation while learning new words.
Weeks 3-4: Grammar and Sentence Structure
Day 15-21: Grammar Basics

Cover basic sentence structure (subject-verb-object).
Introduce present simple and present continuous tenses.
Provide exercises for constructing simple sentences.
Day 22-28: Basic Conversations

Role-play simple everyday conversations (introductions, ordering food, asking for directions).
Practice using present simple and present continuous tenses in conversations.
Encourage students to initiate short conversations with peers.
Weeks 5-6: Intermediate Vocabulary and Tenses
Day 29-35: Expanded Vocabulary

Introduce more advanced vocabulary related to hobbies, travel, work, etc.
Incorporate synonyms and idiomatic expressions.
Use reading materials and videos to expose students to new words.
Day 36-42: Past and Future Tenses

Introduce past simple and future tenses.
Teach common irregular verbs.
Practice forming sentences using different tenses.
Weeks 7-8: Practical Application and Fluency Building
Day 43-49: Real-Life Situations

Focus on discussions about current events, personal experiences, and opinions.
Encourage longer, more complex conversations among learners.
Address grammar errors and provide constructive feedback.
Day 50-56: Group Activities and Debates

Arrange group discussions on selected topics.
Assign debate topics to encourage critical thinking and structured arguments.
Emphasize active listening and responding appropriately.
Weeks 9-10: Advanced Vocabulary and Fluency Refinement
Day 57-63: Advanced Vocabulary

Introduce specialized vocabulary based on learners' interests or professions.
Incorporate reading materials, podcasts, and videos for exposure.
Assign presentations on chosen topics to practice explaining complex ideas.
Day 64-70: Idiomatic Expressions and Slang

Explore idiomatic expressions and slang commonly used in spoken English.
Discuss cultural nuances and appropriateness of using idioms.
Encourage learners to use idioms in conversations.
Weeks 11-12: Public Speaking and Final Review
Day 71-77: Public Speaking Skills

Teach techniques for effective public speaking (intonation, pausing, body language).
Assign short speeches on various topics to boost confidence.
Provide constructive feedback for improvement.
Day 78-84: Final Review and Fluency Practice

Review all grammar concepts, tenses, vocabulary, and idioms covered.
Engage in extended conversations and debates to enhance fluency.
Focus on reducing hesitation and increasing spontaneity in speech.
Weeks 13: Review and Graduation
Day 85-90: Comprehensive Review and Graduation

Dedicate these days to comprehensive review, Q&A sessions, and addressing individual doubts.
Encourage learners to assess their progress and set future language learning goals.
Celebrate completion with a final presentation or discussion on a challenging topic.
Remember that flexibility is important. Adjust the schedule based on the learners' progress and needs. Encourage continuous exposure to English through movies, songs, news, and conversations outside of formal lessons.