private void Teacher_Homepage_Load(object sender, EventArgs e)
{
TeacherAddExam.Hide();
TeacherCorrectExam.Hide();
TeacherStatistics.Hide();
TeacherClassManagement.Hide();
TeacherCalendar.Hide();
TeacherProfile.Hide();
}
private void btnProfile_Click(object sender, EventArgs e)
{
TeacherAddExam.Hide();
TeacherCorrectExam.Hide();
TeacherStatistics.Hide();
TeacherClassManagement.Hide();
TeacherCalendar.Hide();
TeacherProfile.Show();
TeacherProfile.BringToFront();
}