Try planning sisterhood events.. get them motivated.. any teamwork building games, events, and things like that, which will promote bonding..

ask them what they want out of the chapter.. and tell them that rush is important because u dont want just anyone to share in your bond.. if u start off small with teamwork, and bonding moments the motivation will follow

if u need any game ideas i have tons!
every chapter goes through this at one time or another with eboard problems!
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Love, Honor, Truth