Schoolchildren are kept busy as spring turns to summer. Eduardo Rivera, 8, worked on a project at Public School 112 in Harlem. &lt;a href=&quot;http://www.nytimes.com/2006/06/22/nyregion/22june.html&quot;&gt;Go to related 2006 article &lt;/a&gt;&lt;a href=&quot;http://learning.blogs.nytimes.com/category/social-studies/&quot;&gt;»&lt;/a&gt;&lt;a href=&quot;http://www.nytimes.com/2006/06/22/nyregion/22june.html&quot;&gt; &lt;/a&gt;