div.header_top
{
  color:white;
  background-color:black;
  clear:left;
  background-image:url('lego_math_banner2.jpg');
  background-repeat:no-repeat;
  height:150px;
}

h1 {
   font-size: 32px;
   margin: 0px;
   padding: 15px;
   color: #666666;
 }

h2 {
   font-size: 150%;
   margin: 10px;
   padding: 10px;
   line-height:140%;
   color: #666666;
 }

h3 {
   font-size: 125%;
   margin: 5px;
   padding: 5px;
   line-height:140%;
   color: #666666;
 }


div.content_left
{
  float:left;
  width: 400px;
}