Here is the Fa pack! 4 notes, woohoo! I can not stress enough how important rhythm is for students at this point! Before the music gets too complex, demand rhythmical perfection! That way as they progress, they will automatically be more precise.
Another little tip if you are following this program, once a student gets to Fa I teach them to use their right hand on piano. They use their "Magical piano fingers" with their thumb on Do, pointer finger on Ré, middle on Mi...etc. Also at Fa on xylophones, I start insisting they alternate hands each time the note moves to get them used to using both arms.