public class teacher
        {
            //monday
            public bool[] mon = new bool[11];

            //tuesday
            public bool[] tue = new bool[11];

            //wednesday
            public bool[] wed = new bool[11];

            //thursday

for(i=0 ; i <= numberofstudents ; i++)
{
//looking for the students that have chosen maths on HL among all the students
if (students[i].maths == "Higher level")
{
//checking if those students have free time on given lessons
if (students[i].mondaylesson1 == false &&

public class student
        {
            public int number;
            public string surname;
            public string[] subjects = new string[10];
        };

List<student> students = new List<student>();

students.Add(new

public class student
        {
            public static string surname;
            public string[] subjects = new string[10];
        };

        List<student>

if (listView3.SelectedItems.Count != 0)
            {
                foreach (ListViewItem lvi3 in listView3.SelectedItems)
                {  
                    string selection = lvi3.Text;
                    
                    comboBox1.Items.Remove(selection);
                    lvi3.Remove();

ListViewItem lvi3 = new ListViewItem(textBox3.Text);
//now adding the radiobutton value
lvi3.SubItems.Add(textfromradiobutton);