Повідомлення, що надісла(ла)в Howard Miller

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This is one of these questions that gets asked as regularly as a bus turning up. You may want to do a search.

The conclusion is that measuring students performance by time is a complete waste of time. However, I imagine that you're simply being required to produce these figures for the "suits".

So, there are some plugins, for example - https://moodle.org/plugins/block_timestat
 
Moodle has a comprehensive quiz module which I assume would cover the "reflective questioning" bit. The results can be exported.
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This isn't a Moodle error, it's coming from your web server. So you need to ask your server team to investigate.

I'm guessing this is something like an over-sensitive mod-security setup. They can detect a site in theme developer mode (if that's what you mean) as a DOS attack because of the large number of files served.

It does beg the question why you would want to run a site on a hardened server in theme developer mode. You would normally do that sort of thing in a local developer environment (like your desktop machine). Also, Moodle 4.0 has been completely out of support for several months so an upgrade is probably a good idea.
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At a glance, I can't see the 'contextlevel' or 'instanceid' parameters. They're supposed to have default values but not including optional parameters never seems to work for me.
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Did you read... https://moodledev.io/docs/4.4/guides/javascript/jquery

You don't say which Moodle version you are talking about, but if it's reasonably recent it isn't $ (although you can assign it yourself, of course).