There are typically six periods in a school day for CBSE Class 7 students. Let's break down the details of these periods and how they are structured.

1. Morning Assembly:
The day usually starts with a morning assembly, where all students gather to say prayers, sing the national anthem, and listen to important announcements. This period sets a positive tone for the rest of the day.

2. First Period:
The first period is usually dedicated to a core subject like Mathematics, English, Hindi, or Science. This period focuses on teaching and learning the fundamental concepts and skills related to the respective subject.

3. Second Period:
The second period is typically dedicated to another core subject or a language subject. It helps students to further enhance their knowledge and skills in different subjects, ensuring a well-rounded education.

4. Break Time:
After two periods, students get a short break to relax, socialize with their peers, and have some snacks. This break allows students to refresh their minds and prepare for the upcoming periods.

5. Third Period:
The third period is usually dedicated to a different subject, which can be a core subject or a language subject. This period helps to broaden the students' knowledge base and develop their understanding of various subjects.

6. Fourth Period:
The fourth period is typically dedicated to a non-academic subject like Physical Education, Art, Music, or Computer Science. These subjects provide students with a break from the traditional classroom setting and allow them to explore their creative and physical abilities.

7. Fifth Period:
The fifth period is usually dedicated to another core subject or a language subject. This period helps in reinforcing and reviewing the concepts taught earlier, ensuring better understanding and retention of knowledge.

8. Lunch Break:
After the fifth period, students get a longer break to have their lunch, relax, and engage in extra-curricular activities. This break provides a much-needed time for students to recharge before the final period.

9. Sixth Period:
The sixth and final period of the day is typically dedicated to a core subject or a language subject. This period may involve completing assignments, revising topics, or engaging in group discussions.

Overall, the six periods in a school day for CBSE Class 7 students follow a well-structured routine that covers various subjects, allowing students to receive a comprehensive education and develop their skills in different areas.