Plan a train-the-trainer program

Help me plan a train-the-trainer program so internal people can deliver a course or training consistently. Course they will deliver: [topic, length, format - in person / virtual / blended] Learners they will teach: [roles, number, locations, languages] Who the trainers are: [e.g. "experienced supervisors with no teaching experience", "subject matter experts"] Number of trainers and timeline: [DETAILS] Materials we already have: [slides, facilitator guide, activities, assessments] Constraints: [budget, time away from regular work, tools] Give me: 1. Trainer selection criteria: subject knowledge, communication, credibility, and availability, and how to assess them. 2. Program outline: sessions covering the course content itself, how adults learn, facilitation skills (asking questions, managing discussion, handling difficult participants), running each activity, virtual delivery skills if relevant, and assessing learners. 3. Practice teaching: each trainer delivers sections of the real course and gets feedback using a simple observation rubric. Include the rubric. 4. Trainer toolkit: what goes in it - facilitator guide with timings, slide notes, activity instructions, FAQs and tricky questions with answers, and a setup checklist. 5. Certification: what a trainer must show before teaching alone, and co-delivery with an experienced trainer first. 6. Keeping quality consistent: learner feedback, periodic observation, a trainer community or check-in, and how to update materials across all trainers. 7. Timeline from selection to first solo delivery. Keep it practical for trainers who have full-time jobs.