span#content-teaching {
 display:none;
}

input#show-teaching:checked ~ span#content-teaching {
 display:inline;
}

input#hide-teaching:checked ~ span#content-teaching {
 display:none;
}

label.toggle-hidden {
 cursor:pointer;
 font-weight:normal;
 font-size: 90%;
 text-decoration: underline;
}