diff --git a/st-lesson-1.module b/st-lesson-1.module
index 28d5c4c..d1148f4 100644
--- a/st-lesson-1.module
+++ b/st-lesson-1.module
@@ -6,6 +6,8 @@ TARGET_LANG_G: en
 HOME_LANG_G: en
 VOICE_DEFAULT: aoede | Clear, friendly American English narrator
 VOICE_INTRO: aoede | Speak like a friendly narrator
+VOICE_PROMPT: achird | Questions and cues, read clearly
+VOICE_RESPONSE: schedar | Model answers, warm and clear
 VOICE: David | achernar | Male student
 VOICE: Robert | achird | Male student
 VOICE: Andrew | schedar | Male student