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Groups (grupos table) are the core organizational unit of the TEI. Each group has a proficiency level, age category, classroom, and a teacher assigned to it. Students are linked to teachers, which implicitly assigns them to a group. The group list is accessible at /view/listas/listaGrupos.jsp from the admin lateral menu.

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Crear un grupo

1

Navigate to Agregar Grupo

From the admin lateral menu, click Grupos to open the group list, then click the Agregar Grupo button. This navigates to /view/add/agregarInformacion.jsp?add=4.
2

Fill the group form

Complete all required fields. The form reads exactly three parameters via request.getParameter():
  • Nivel (grade) — proficiency level selected from the grade catalog:
    • Básico (id: 1)
    • Intermedio (id: 2)
    • Avanzado (id: 3)
  • Nivel del 1 al 3 (level) — integer subgroup number within the chosen level (minimum 1, maximum 3)
  • Categoría (category) — age category selected from the category catalog:
    • Niños (id: 1)
    • Adolescentes (id: 2)
There is no classroom field on the creation form. The classroom_group column is initialized to "null" by the servlet and cannot be set at creation time.
3

Submit the form

The form submits via POST to the addGroup servlet (/tallerDeInglesUAEM/addGroup), which:
  • Parses the grade, level, and category integer parameters from the request
  • Creates a Grupos object with classroom_group hardcoded to "null" and inserts it into the grupos table via base.insertarGrupos(grupo)
4

Confirmation

On success, the servlet sets a session confirmation message (“Grupo Agregado correctamente”) and redirects to the group list at /view/listas/listaGrupos.jsp.

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Estructura de un grupo

CampoTipoDescripción
id_groupINT (PK)Identificador único del grupo
id_gradeINT (FK)Nivel: Básico (1), Intermedio (2), Avanzado (3)
level_groupINTNúmero de subgrupo dentro del nivel (1–3)
id_category_groupINT (FK)Categoría: Niños (1), Adolescentes (2)
classroom_groupVARCHARSalón de clases asignado
The id_grade and id_category_group values are foreign keys resolved from the grade and category catalog tables respectively. Their human-readable labels are fetched at runtime using base.obtenerNivel() and base.obtenerCategorias() in the JSP layer.

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Asignar profesor a un grupo

Assigning a teacher to a group is done through the teacher’s profile, not the group form. The teachers table stores the group association via the id_group_teacher field. To assign or change a teacher’s group:
  1. Open the teacher edit form via the pen icon in the teacher list.
  2. Select the desired group from the Grupo asignado dropdown.
  3. Submit — the updateInfo servlet (POST /tallerDeInglesUAEM/updateInfo with rango=PROFESOR) updates id_group_teacher on the teachers record.
When a student is assigned to a teacher, they are implicitly placed in that teacher’s group. A teacher may have id_group_teacher = NULL if they are not currently assigned to any group.

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Eliminar un grupo

The group list (/view/listas/listaGrupos.jsp) exposes only a delete action — there is no inline edit button for groups. To change a group’s level or category, delete the old record and create a new one with the correct values. Delete a group by clicking the delete icon in the group list, which submits a form to POST /tallerDeInglesUAEM/deleteInformation with parameters rango=g and the group’s id. The servlet executes the following sequence:
1

Desvincular profesores

Calls bd.desvincularProfesores(id_group) — sets id_group_teacher = NULL for all teachers currently assigned to this group.
2

Eliminar registro del grupo

Calls bd.eliminarGrupo(id_group) — removes the row from the grupos table.
Students are linked to teachers, not directly to groups. Deleting a group does not remove student records or their teacher assignments, but it will remove the teacher’s group association. After deleting a group, re-create the group and reassign the affected teacher to restore the full class structure.

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Cambiar periodo semestral

The TEI system supports two academic payment periods: Periodo A and Periodo B. Switching between them updates the payment calendar visible to all users. The period toggle is performed via POST /tallerDeInglesUAEM/updatePeriodo, which updates all rows in the pay_simbology table — excluding entries with a Cualquiera (any-period) designation. Each invocation flips the active period from A to B or from B to A, updating the payment schedule displayed in /view/pagos/calendario.jsp.

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