<https://www.classroomfreebies.com/2016/04/fern-smiths-free-addition-doubles-plus.html#webpage>
<http://schema.org/datePublished>
"2016-04-02T10:30:00+00:00"^^<http://schema.org/Date>
<https://www.classroomfreebies.com/2016/04/fern-smiths-free-addition-doubles-plus.html>