ul.two-column {
-moz-column-count: 2;
-moz-column-gap: 2.5em;
-webkit-column-count: 2;
-webkit-column-gap: 2.5em;
column-count: 2;
column-gap: 0em;
list-style-type:none;
padding-left: 0px;
width: 80%;
margin: 40px auto;
}

ul.two-column li {
line-height: 1.3em;
padding-bottom: 16px;
}

.address {
    display:flex;
}
.students {
    flex-grow:2;
}
.staff {}

.photo-cards {
    display:flex;
}
.card {
    flex:1;
}
.card img {
    max-width:169px;
}

 @media only screen and (max-width: 650px) {
.photo-cards {
    display:block;
}
.card {
    flex:none;
}
.card img {
    min-width:100%;
}
.address {
    display:block;
}
ul.two-column {
-moz-column-count: 1;
-moz-column-gap: 0;
-webkit-column-count: 1;
-webkit-column-gap: 0;
column-count: 1;
column-gap: 0;
list-style-type:none;
padding-left: 0px;
width: 80%;
margin: 40px auto;
}

ul.two-column li {
}
}