#BusinessCard {
    background-image: url(../i/bcard.jpg);
    background-size: cover;
    height: 400px;
    width: 775px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 40px;
}
#teachingPhoto{background-image: url(../i/teaching2.jpg); height: 534px;
width: 800px;
margin-left: auto;
margin-right: auto;
margin-bottom: 40px; background-size:contain;}