This self-paced interactive course is freely available on Wolfram U and you can get a certificate of completion or a level-1 certification. See the course catalogue for details information and link to access it.

Not yet!

I have started a couple of weeks ago, doing the units in sequence. I watch the video, then read the compagnon notebook (redoing and toying with most of the given exemples), and finally answering the exercises.

I have completed units 1 to 19 so far, although I have a lot of trouble with the automatic grader for this unit: only one answer out of 15 was marked as "correct"! Which is unexpected since even question 12 is marked as incorrect even when using the code given in the video! In other words, even the solution provided as an exemple of question 12 in the course does not work!

Nevertheless, in my opinion, it's a good training that allows us to explore the many facets of the Wolfram Language.

What is your experience with this course?

I reached lecture 22 (Machine Learning) and got in trouble with the exercises there. To get the certificate I try to solve the graded exercises 22.3, 22.9, 22.12. and 22.14. Although the solutions seem straightforward and result in the expected outputs, they are graded as incorrect. For example 22.3 Make a table of image identifications for an image of a tiger, blurred by an amount from 1 to 5. I have no idea what is wrong with my solution

Table[ImageIdentify[
  Blur[Entity["TaxonomicSpecies", "PantheraTigris::63rj9"][
    EntityProperty["TaxonomicSpecies", "Image"]], r]], {r, 1, 5}]

I have similar problems with 22.9 and 22.12, only for 22.14 I get the result graded as correct.

Yes, you are probably right in assuming that an LLM is at work here. My guess is that some updates have not been made to the AI or that some changes have been made to WL that have broken the grader on this specific chapter about dates and times computations.

I did, just not this iteration. I believe this iteration has some more extensive content regarding LLM and ML.