Impressive Instructional App – TapCoding Review

I'm an older person, and have taken the time to learn many different things over the years... both in schools/colleges and on my own in spare time... I have also been a teacher (3 years teaching Spanish, Social Studies & Grammar at a k-12 private school), a trainer for jobs, and a voluntary teacher/critic for others in general... reviewing game strategies for games like chess, go, & modern rts or moba games). Learning new things and teaching others has been a common constant my whole life... and this app so far has continued to impress me. Well-designed by people who obviously understand instructional methodology, as well as the subject matter being explained, this app is an instructional tool that breaks down coding into simple segments that do not over-extend and encourage a proper, steady pace of learning, and utilize almost all of the techniques for optimal retention (Explaining, Quizzing, & Multiple practice forms... only missing auditory segments insofar as recommended teaching methods) Personally, I am including for myself a long-term project idea, where I add a little more after each lesson so as to practice implementation on my own. (Hopefully, by the end of the course, I will have a working prototype of an app I'd like to create) If the app could encourage such an open-ended portion as well, it would be perfect.
Review by Naitt on TapCoding.