private void back_firstGrade_map1_btn_Click(object sender, RoutedEventArgs e)
{
var studentTeacher = new StudentTeacher();
studentTeacher.Show();
this.Hide();
}
private void closeOpenFileBtn_Click(object sender, RoutedEventArgs e)
{
var studentTeacher = new StudentTeacher();
studentTeacher.Show();
this.Hide();
}
private void safetyRoadBtn_Click(object sender, RoutedEventArgs e)
{
var studentTeacher = new StudentTeacher();
studentTeacher.Show();
this.Hide();
}