.schoolElegantDemeanourBox{
    height:430px;
}
.schoolElegantDemeanourBox>div{
    width:300px;
    height:200px;
    float:left;
    margin:10px;
    box-sizing: border-box;
    border:1px solid #ccc;
    border-radius: 4px;
}

.schoolElegantDemeanourBox>div>img{
    width:100%;
    height:100%;
}