Sounds and Writing Module
[p.15] The Japanese Sound System and Hiragana
Watch this video when you start studying The Japanese Sound System and Hiragana on p.15.
[p.35] SW3-1. The Three Japanese Writing Systems
Watch this video when you start studying SW3-1. The Three Japanese Writing Systems on p.35.
Grammar Module
[p.41] GP1-1. Particles and Word Order
Watch this video when you start studying GP1-1. Particles and Word Order on p.41.