Directions in Hexagonal Systems, chalkboard

This is the chalkboard version of this topic, including three examples.
I have posted three versions of this topic (1.Annotated Tablet, 2.Talking Head, 3. Chalkboard) and I'm interested to learn which version people find most useful.

[@banajadandasena4142]

What is the interplanar spacing for BCC and fcc lattice sir?

[@ramonlegaspi457]

Very helpful!!! Thank you!

[@LanaOw]

You are great! thanks

[@lollypaapu6267]

Sir direction and value change if we take xyz as different cube right??

[@arnikatabassum5241]

thank you so much..really helpful

[@purplepenguin91]

You are fantastic

[@amaniabualadas1658]

many thanks

[@YashSharma-si8on]

Amazing

[@saisarath623]

Good lecture Sir!!

[@user-hy7wl9sz5d]

really helpful

[@atarmstr4505]

Chalkboard!

[@sanjayprajapat1665]

Thank you sir

[@ahmadnooh6825]

If I want to draw [1111] please could you help me.thanks

[@tracyochieng3563]

Increase the size of the chalkboard for easier visibility

[@webstime1]

Chalkboard

[@Mnzmanzmz]

Why is it so difficult???

[@ifigeneiatziolas8299]

CHALKBOARD

[@yahyeahmedousalim1186]

Explique en fraçais SVP

[@sumsum6901]

Hindi bol

[@kalamolang5677]

same example psssh