I spotted a few typos etc in your web pages. Hope this list is
useful.
If at the first edition
don't use this word "edition", say "at the first staging", or better still,
"the first time the school took place"
insite -> insight
european -> European
we hope to reach a friendly atmosphere as in the past edition of the school
achieve previous staging
internationally renown experts
renowned
"programme" and "program" are used interchangeably; be consistent;
since you use US spelling elsewhere, stick with "program"
"accomodations" should be singular
partecipants -> participants
justificatory of payment -> proof of payment
