## Lessons

id | lessonName | teacherId
--- | --- | ---
1 | Introduction to Math | 1
2 | Beginner English Grammar | 2
3 | Ancient History Timeline | 3
4 | Cell Structure and Function | 4
5 | Basics of Physics | 5

## Activities

activityType | description
--- | ---
Group_Work | Collaborative learning task
Individual_Project | Personal project assignment
Quiz | Short test to assess understanding
Lecture | Instructor-led presentation on a topic
Discussion | Classwide conversation about a topic

## Students

studentId | name | age
--- | --- | ---
1 | Alice | 12
2 | Bob | 13
3 | Charlie | 14
4 | David | 15
5 | Eva | 16

## Teachers

teacherId | name | subject
--- | --- | ---
1 | Mr. Smith | Math
2 | Ms. Johnson | English
3 | Mrs. Lee | History
4 | Dr. Brown | Biology
5 | Professor White | Physics

## Enrollments

enrollmentId | studentId | classId
--- | --- | ---
| (→ Students.studentId) | (→ Lessons.id)
1 | 1 | 1
2 | 2 | 2
3 | 3 | 3
4 | 4 | 4
5 | 5 | 5

## Lessons_Activities

lessonsActivityId | lessonsId | activitiesType
--- | --- | ---
| (→ Lessons.id) | (→ Activities.activityType)
1 | 1 | Group_Work
2 | 1 | Quiz
3 | 2 | Individual_Project
4 | 2 | Lecture
5 | 3 | Quiz
6 | 2 | Quiz
7 | 4 | Quiz
8 | 5 | Quiz