[Theme: Twenty Fourteen] The_Content not showing in custom post page

I’m building a custom post template–single-lesson.php.

This code seems to work ok, except that the content does not display–my Shareaholic buttons, which are located inside the content DO display, which is weird!

<?php get_header(); ?>
<div id="primary" class="content-area">
<div id="content" class="site-content" role="main">
<?php twentyfourteen_post_thumbnail(); ?>
<div class="entry-meta">
<span class="cat-links"><?php echo get_the_category_list( _x( ', ', 'Used between list items, there is a space after the comma.', 'twentyfourteen' ) ); ?></span>
</div>
<div id="lessonplantitle">
<?php the_title( '<h1 class="entry-title">', '</h1>' );?>
</div><!--lessonplantitle-->
<div id="lessonplantaxonomies">
<?php
echo get_the_term_list( $post->ID, 'level', 'Level: ', ', ', '<br>' );
echo get_the_term_list( $post->ID, 'skill', 'Skill: ', ', ', '<br>' );
echo get_the_term_list( $post->ID, 'area', 'Area: ', ', ', '<br>' );
echo get_the_term_list( $post->ID, 'time', 'Time: ', ', ', '<br>' );
echo get_the_term_list( $post->ID, 'theme', 'Theme: ', ', ', '<br>' );
?>
</div><!--lessonplantaxonomies-->
<div id="lessonplanintroduction">
<h2>Introduction</h2>
<?php the_field('introduction') ?>
</div><!--lessonplanintroduction-->
<div id="lessonplancontent">
<?php
the_content( __( 'Continue reading <span class="meta-nav">&rarr;</span>', 'twentyfourteen' ) );
?>
</div><!--lessonplancontent-->
<div id="lessonplanextension">
<?php
if(get_field('extension'))
{;?>
<h3>Extension</h3>
<?php  get_field('extension');
}?>
</div><!--lessonplanextension-->
twentyfourteen_post_nav();
if ( comments_open() || get_comments_number() ) {
comments_template();
}
endwhile;
?>
</div><!-- #content -->
</div><!-- #primary -->
<?php
get_sidebar( 'content' );
get_sidebar();
get_footer();
<A href="https://www.englishadvantage.info/testblog/lesson/parallel-structure/">Link to the page</a>