It must be taught by someone who can speak english clearly. Sorry but I couldn't understand what Mercedes Paniccia spoke, which made the course even more difficult to understand. There are subtitles but it's not possible for everyone to put that much effort. This issue must be taken seriously to make this MOOC much better.

'Teachers who make physics boring are criminals' - Walter Lewin.

Professors are just reading notes and explaining nothing including theory and derivations. Nothing has been explained intuitively. Particle physics is one of the most interesting fields in this discipline but this course has done injustice to it.

Dry, scarce and unenthusiastic presentation with heavy accents. Lack of reading materials. Having an engineering degree with good understanding of math and basic physics I found it impossible to follow this material. Reading all the negative comments, surprised how they achieved the high rating of 4.5.

It is a really badly prepared course. I really tried to overcome issues with it, however I didn't want to waste too much of my time. I cannot understand some professors, there are no materials provided - only slides that don't explain much. Very disappointed.

this course is not at all suitable for someone who is here to learn particle physics. the teachers assume that we already know what all the symbols mean and its like they are not teaching but reading.

The Professor might be a brillant scientist, but as a teacher he is not that bright. Few others have developped the poor course at length previously. No need to repeat!

Didn't enjoyed the lectures.