Parents need to understand that KA is not a substitute for the teaching paradigm, but rather introduces a great tool for self-enrichment - as the article suggests, a "supplement" to homework and education, KA is great. But the "education" itself is a varied and dynamic system that cannot completely rely on a child to be self-motivated. Few 7 year olds are self-motivated to master math, and gamification is just another arrow in the quiver, but not the panacea. Learning is IMO at least a 2 step process, requiring participation beyond simply multiple choice and listening, it most importantly requires exploration and deep problem solving skills. For example, being assigned a math word problem where the child must read, re-read and attempt to find the answer using at least 30 minutes of analysis before realizing the true nature of the word problem. That 30 minute process is an important mental exercise that cannot be circumvented. KA is a great way to quickly understand a concept, but true mastery requires application, and having a teacher present to gently guide without revealing the answer is an art.
Being a parent that closely monitors his child's learning process, I'm very careful to never give my child the answer, but just enough hints to keep him from being frustrated - ultimately, HE must figure it out, never me. KA is a great way for my son to learn about a subject, but the next stage is when I take him away from KA and start applying those concepts to real life problems.
Parents need to understand this 2 step process.