.parallax#category_education{
    background: url('images/education.jpg') fixed no-repeat center;
}
.parallax#category_personal{
    background: url('images/personal.jpg') fixed no-repeat center;
}
.parallax#category_business{
    background: url('images/business.jpg') fixed no-repeat center;
}
.parallax#category_technology{
    background: url('images/technology.jpg') fixed no-repeat center;
}