No, both options are complete by themselves. However, there are benefits to using
both, as well as benefits to only using the software or the instructor materials.
Benefits of both:
Many people choose to buy both because they feel both direct instruction and independent
learning are beneficial to their child’s learning style. Many individuals teach
with the instructor materials and then have the learner use the software to reinforce
what they were taught.
Benefits of software only:
Many people choose to buy only the software because they feel their child would
prefer to learn independently. Some children resist direction from their parent
and do better learning on their own. Another reason many parents/mentors choose
to only use the software with their child is because they do not have the time to
teach their child with the instructor materials.
Benefits of instructor materials only:
Some parents and mentors feel the learner gets distracted on their own and will
not focus when using the software. If you worry that your child will only pay attention
if you are with them, then the instructor materials would be a good fit.