//Clear function
private void ClearListBoxes()
{
Avg1.Clear();
Avg2.Clear();
Avg3.Clear();
Avg4.Clear();
Avg5.Clear();
Avg6.Clear();
GrdNeeded.Clear();
Ovrl.Clear();
like.Clear();
think.Clear();
Grade1.Clear();
Grade2.Clear();
Grade3.Clear();
Grade4.Clear();
Assign.Checked = false;
Quizz.Checked = false;
Labs.Checked = false;
Midterm.Checked = false;
checkBonus.Checked = false;
W1.Clear();
W2.Clear();
W3.Clear();
W4.Clear();
}