Just as additional information for anyone who’s interested, especially if these katakana are difficult for them: all of these kana except for ン share origin kanji with their hiragana counterparts:
I don’t know if this helps, but it’s you look up the source kanji on the Wikipedia ‘Kana’ page, you’ll realise that there are a lot of overlaps between hiragana and katakana sources. That means it might take you less effort, especially if you know those kanji already (or at least something similar). Here’s an example: つ and ツ both come from 川. If you know the correct stroke order, you’ll realise つ is just a linked-up version of ツ with the bumps smoothed out. That’s one of the commonly confused …
Here’s a related post on the same thread that includes diagrams from Wikipedia on kana origins that might help making the similarities easier to see:
This is interesting, and I haven’t given a thought to the origin of kana in a long time. I am going to spend a little time with kana. Here is the image of origins from wikipedia [image] also this chart shows regular character, cursive script, and hiragana [image]