diff --git a/booking.install b/booking.install
index 0f7cb11..da38b2f 100644
--- a/booking.install
+++ b/booking.install
@@ -140,8 +140,17 @@ function booking_update_7202() {
 * Add tables for study group calculations
 */
 function booking_update_7203() {
+	//This lists all the study group sessions
+	$booking_studygroup_list = array(
+		'fields' => array(
+			'sid' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_eventid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_studygroup_descrip' => array('type' => 'varchar', 'length' => '500', 'not null' => FALSE),
+		),            
+		'primary key' => array('sid'),
+	);	
 	
-	//TODO: Figure out what fields we need
+	//this maps people to particular study groups
 	$booking_studygroup_mapping = array(
 		'fields' => array(
 			'sid' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
@@ -154,6 +163,24 @@ function booking_update_7203() {
 		'primary key' => array('sid'),
 	);
 	
+	//this defines the number of leader/helper sessions for a particular person
+	$booking_leadhelp_list = array(
+		'fields' => array(
+			'id' => array('type' => 'serial', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_eventid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_node_id' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_total_lead' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_total_help' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_available_lead' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+			'booking_available_help' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'disp-width' => '10'),
+		),            
+		'primary key' => array('id'),
+	);	
+	
+	db_create_table('booking_studygroup_list', $booking_studygroup_list);
+	db_create_table('booking_studygroup_mapping', $booking_studygroup_mapping);
+	db_create_table('booking_leadhelp_list', $booking_leadhelp_list);	
+	
 }
 
 /**