private int high(int startindex)
	{
		if (startindex == grades.length-1)
		{
			return grades[startindex];
		}
		else
		{
       		int highRest = high(startindex+1);
       		if (grades[startindex] > highRest)
       		{
       			return grades[startindex];
       		}
       		else
       		{
       			return highRest;
       		}
		}
         
	}