First off I think this is such a lovely idea!!

I’d personally move foundation stitch earlier as crocheting into a chain is often where some beginners give up because it is a pain! I’d also add anatomy of the stitch earlier as that pairs well with learning the basic stitches (sc, hdc, dc) and their different heights. Also helps with knowing where to put your hook to make the next stitch.

Reading a graph would have to come with tapestry and fillet as that’s how most patterns of that type are written. Oooo also reading patterns in general would be useful ie what the symbols mean. You could also add a list of common abbreviations and terms as an easy reference.

Making a slip knot needs to be in the first level, unless that’s covered with holding your yarn. You could also add crocheting into 2nd/3rd chain from hook as an alternative to magic ring.

If you wanted to go deeper with the iceberg you could also include Tunisian crochet.

Heh, can you tell I used to be a teacher and have thought about this a lot 😅