If this wasn't now, it was in may then. I was the classmaster of an oil-rig workers' class in MPSŠC. They didn't do their practical work one day a week, as everyone else, because their place of work would be too far, somewhere in the fields. So they had it all crammed in six weeks at the end of the year (construction machinery operators also did so). Their 33-week schedule had to be fit into 26 weeks, which meant it had to be changed at least twice a year, which then required changes in schedules of at least six teachers - some subjects had to go with an extra hour a week, then another set of them, then none - which created quite a mess and cost me many hours and about a kilometer of nerves every year (I made the schedule 1982-86).
Last year they tried, as an experiment to, have them do three weeks in march and three in the end. Worked alright as practice is concerned, but not so well when they returned to benches after the first three weeks out in the fields. They not only haven't seen a living person all the while, they haven't seen a woman (although in my class there was one girl, a Nataša, but her didn't call her Naftaša, but rather Naftarica*). One female professor, whom they also didn't see for three weeks, and who was also very forward, backward and narrowly expert**, understood she's under scrutiny of two dozen hungry male eyes which just couldn't sit quiet, so she asked "what's up with you guys today?" and got "exuse us, professor, you know, we're drillers".
So taking them to an ekskurzija had to happen before or after these six weeks. My roommate was some guy who was teaching the pre-army training aka elements of people's civil defense. His wife was teaching us maths in gimnazija when I was fourth grade. It's a small town, even with nine high schools. And, BTW, she was the reason I wondered, as a freshman, why everyone else knew integrals so much better than we did. It's because she spent too much time doing combinatorics and orders and when we should have finished derivatives, we were just getting introduced to them. The integrals were an afterthought for the last couple of weeks, I barely remember doing them then. Because combinatorics was her thing, and she was thin on infinitesimal calculus.
We went to Ivanićgrad first, where they had a whole oil rigger school, not just two classes. They even had their own school rig, which we saw. The engineer from Naftagas, who was the part-time teacher for the trade subjects, said we have a very similar one in Elemir. I asked him whether he was from Belgrade or Radojevo (aka Klarija aka Peterda, the village on romanian border). The latter, he said, how did I know? The only two places on Earth where they pronounce Elemir with short falling accent on first syllable, not long rising on second.
They organized a party in the school for us. Not too many girls, obviously, though I managed to dance a little with one of the female colleagues of their staff. Nothing happened, including the quasi incident later in the night, when boys went to town and got drunk. The accusation was that two of them were singing "Oj vojvodo Sinđeliću", which is the hallmark of serbian nationalists, what could be found of them. However, the incident petered out when it was found that both perpetrators were hungarian...
The second day was non-vocational, we visited some historical places around - Kumrovec with Tito's house and the political school (which I successfully managed to not attend), the monument on Petrova Gora. In the only other house apart from the alleged Broz's house, the guys bought a bottle of mineral [water], and someone took a longish swig and burped loudly, pig style, to which someone replied right away with „radenska, sayonara!“ in full Toshiro Mifune style. We all knew how the Japaneses sound in movies, and in Radenska's ad too.
Ended up spending the night in Prijedor, a nice little town in northwest Bosnia, where I found to buy few packs of click buttons for jeans, which we mostly had trouble finding (bought the last packs in Germany, or her relatives would bring some), so she was almost trying to recycle the old ones. Which didn't work, they deform when mounted - they are practically two-part rivets.
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* nafta is serbian for crude oil; naftarica is heating oil area heater.
** „struka“ - profession, field of expertise, hence stručnjak is expert; struk - a waist.