I'm using a hidden for with a checkbox to send strings to a property, but they are sent even if the checkbox isn't checked

so I've been trying to use a checkbox to send a list of values to a string property in my model. but for some reason, the values are sent, even after i initialized with the bool false and left the checkbox unchecked.

these are my models

public class Profesor
{        
    public List<AsignaturaModelo> Asignaturas { get; set; }

    public Profesor()
    {
        Asignaturas = new List<AsignaturaModelo>();
    }

}

public class AsignaturaModelo
{
    public string NombreA { get; set; }


    public bool Selected { get; set; }
    
}

My controller

public ActionResult Create()
        {
            var model = new Profesor
            {
                Asignaturas = new[]
                {
                    new AsignaturaModelo{NombreA = "Programacion 1", Selected = false},
                    new AsignaturaModelo {NombreA = "Programacion 2", Selected = false}
                }.ToList()
            };
            return View(model);
        }

        
        [HttpPost]
        [ValidateAntiForgeryToken]
        public ActionResult Create(Profesor modelo)
        {
            try
            {
                
                if (ModelState.IsValid)
                {                   
                    profesors.Add(modelo);
                    return RedirectToAction(nameof(Index));
                }

            }
            catch
            {
                return View(modelo);
            }
            return View(modelo);
        }

My view

@Html.EditorFor(x => x.Asignaturas)

and my EditorTemplate

@model AsignaturaModelo

    <div>
        @Html.CheckBoxFor(x => x.Selected)
        @Html.HiddenFor(x => x.NombreA)
        @Html.LabelFor(x => x.Selected, Model.NombreA)
    </div>

Not sure what am i doing wrong, also sorry for the variable names. Thanks in advance!