You could use Microsoft® SQL Server® 2008 Management Studio Express to configure.

What does ResetChecked(); do? And why are we not using a CheckBoxList Control versus just a bunch of CheckBoxes?

You seem to already have most of the work done. I would look into this tutorial C# Tutorial it would be pointless for me to actually post the code for you since the solution is only a few google searches away.

I believe the right connection string would be the following:

private void button1_Click(object sender, EventArgs e)
        {
            string fileName = @"C:\test.xlsx";
            string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="   + fileName + ";Extended Properties=\"Excel 12.0;HDR=YES;\"";
            OleDbConnection con = new System.Data.OleDb.OleDbConnection(connectionString);
            con.Open();
            OleDbDataAdapter cmd = new System.Data.OleDb.OleDbDataAdapter("select * from [SHEET1$]", con);
            DataSet excelDataSet = new DataSet();
            cmd.Fill(excelDataSet);
            xl.DataSource = excelDataSet.Tables[0];
            con.Close();
        }

For sanity check I added the (@) to the string.

        public static int FindStudentPosition(string name, string[] array)
        {
            [b]string target = 0;[/b]
            int result;
            target = Console.ReadLine();


            Array.FindAll(arrayName, s => s.Equals(target));

            return result;

        }

Cant Convert String to Ints. Either do a cast or change the type from string to int. Your method doesnt even return anything at all either.

foreach( KeyValuePair<string, string> kvp in openWith )
{
    Console.WriteLine("Key = {0}, Value = {1}", 
        kvp.Key, kvp.Value);
}

I agree with everyone above about using Objects. I do think you need to get the basics down when it comes to arrays as well. I would opt for a KeyValuePair the key being the student name and the pair being the test score. You can read more about it on MSDN.

MSDN - KeyValuePair<TKey, TValue> Structure