an be provided but people may miss them and children may not be able to read or understand them. With this technique all material is checked and if it violates flash or red flash thresholds it is either not put on the site or it is modified so that it does not violate the thresholds.</p>
      <div class="note">
         <p>There are some simple tests that can be run for particular simple types of flashing. For example:</p>
         <ul>
            <li>If material flashes 3 times per second or less then th