diff --git a/inc/helpers/namespace.php b/inc/helpers/namespace.php
index 8b74d33..4a97d51 100644
--- a/inc/helpers/namespace.php
+++ b/inc/helpers/namespace.php
@@ -158,19 +158,18 @@ function get_institutions(): array {
 		return [];
 	}
 
-	return \Pressbooks\Metadata\get_institutions();
+	return \Pressbooks\Metadata\get_institutions_flattened();
 }
 
 /**
  * Get institutions currently in use.
  *
  * @param array $catalog_data Catalog data
- * @param array $institutions Institutions
  *
  * @return array
  */
-function get_available_institutions( array $catalog_data, array $institutions = [] ): array {
-	$institutions = $institutions ?? get_institutions();
+function get_available_institutions( array $catalog_data ): array {
+	$institution_list = get_institutions();
 	$book_institutions = array_reduce( $catalog_data['books'], static function( $carry, $book ) {
 		$names = array_reduce( $book['metadata']['institutions'] ?? [], static function( $carry, $institution ) {
 			return array_merge( $carry, [ $institution['name'] ] );
@@ -179,7 +178,7 @@ function get_available_institutions( array $catalog_data, array $institutions =
 		return array_merge( $carry, $names );
 	}, [] );
 
-	return array_intersect( $institutions, $book_institutions );
+	return array_intersect( $institution_list, $book_institutions );
 }
 
 /**
diff --git a/page-catalog.php b/page-catalog.php
index 43b8582..8ad195b 100644
--- a/page-catalog.php
+++ b/page-catalog.php
@@ -27,7 +27,7 @@ $next_page = $current_page + 1;
 $licenses = get_catalog_licenses();
 $available_licenses = get_available_licenses( $catalog_data );
 $institutions = get_institutions();
-$available_institutions = get_available_institutions( $catalog_data, $institutions );
+$available_institutions = get_available_institutions( $catalog_data );
 $subjects = ( defined( 'PB_PLUGIN_VERSION' ) ) ? \Pressbooks\Metadata\get_thema_subjects() : [];
 $available_subjects = get_available_subjects( $catalog_data );
 
diff --git a/partials/book.php b/partials/book.php
index cd920b7..99724d4 100644
--- a/partials/book.php
+++ b/partials/book.php
@@ -14,7 +14,7 @@ $institution_codes = array_map( static function ( $item ) {
 	return $item['code'];
 }, $book['metadata']['institutions'] ?? [] );
 $institution_names = array_map( static function ( $item ) {
-	return \Pressbooks\Metadata\get_institution_by_code( $item['code'] );
+	return \Pressbooks\Metadata\get_institution_name( $item['code'] );
 }, $book['metadata']['institutions'] ?? [] );
 ?>
 <li class="book"