Hey guys, I am wondering why does this works:

<?php
class ArticleHolder extends Page {
    private static $allowed_children = array('ArticlePage');
}
class ArticleHolder_Controller extends Page_Controller {
    public function PaginatedPages() {
        $results = ArticlePage::get()->sort('Date DESC');
        $paginatedItems = new PaginatedList($results, $this->request);
        $paginatedItems->setPageLength(3);
        return $paginatedItems;
    }
}

and then this does not

<?php
class ArticleHolder extends Page {
    private static $allowed_children = array('ArticlePage');
}
class ArticleHolder_Controller extends Page_Controller {
    public function PaginatedPages() {
        $results = Testing();
        $paginatedItems = new PaginatedList($results, $this->request);
        $paginatedItems->setPageLength(3);
        return $paginatedItems;
    }

    public function Testing(){
        return ArticlePage::get()->sort('Date DESC');
    }
}

Any thoughts?

Testing() is a method, so you need to use $this->Testing() to call it.

that would explain why

$this.Testing();

wasn't working either. Thank you, I will give this a shot tonight.