sort of a broad inquiry to answer. Are you referring to domains with the word "education" in it? I mean, college tends to be year round, even throughout summer. I think this depends on your target audience with the domain name a great deal.
I own a few educational genre domains. I don't see much difference in activity etc during the summer months and typical school year. I own a few psychology related domains, which are targeted at college writers - and I don't notice anything "seasonal" going on with them. I do have one domain parked that is extremely specific towards math tutoring - again, I have seen no differences seasonally with it.
Does this help? I'm just answering off a whim here. When you say "action" - are you referring to hits on a parked domain? Hits on selling the domains? Activity on a parked website? etc...