Design a 4-week exercise plan for a typical Grade 6–8 student using the FITT principle (Frequency, Intensity, Time, Type). Provide a weekly schedule with 3–5 sessions per week, age-appropriate activities covering cardio, strength, and flexibility, clear intensity and time prescriptions, measurable goals and progression across weeks, safety considerations and modifications for differing abilities, and simple assessment criteria to track student improvement. Keep the plan practical, engaging, and suitable for school or home settings.