My FAVORITE tool to track auditory skills is the Auditory Learning Guide by Beth Walker (my professional idol!) This tool gives you a really nice sequence of listening skills up to 4 years post-amplification. You can find the ALG here: Auditory Learning Guide
The Auditory Skills Checklist was developed by Nancy Caleffe-Schneck (and adapted by Karen Anderson) to assess functional listening skills in young children with hearing loss. It can be found here: Auditory Skills Checklist
Two parent interviews about home listening behaviors are the CHILD (Children's Home Inventory for Listening Difficulties) and the ELF (Early Listening Function). Both of these were developed by Karen Anderson and are available from Phonak here: CHILD and ELF
This list is definitely not exhaustive. There are a lot more resources out there...and many of them free! Please feel free to share any tool you use to help you assess or track auditory skills! Thanks!