It's an impressive track record, and so we look back and we say, well, we didn't really exactly work this out theoretically from the start, but when we look back, there are theoretical movements in science education.
Se on vaikuttava saavutus ja  voimme katsoa taaksemme ja sanoa: Emme selvittäneet tätä  teoreettisesti alusta alkaen, mutta katsoessamme taaksemm e on tiedeopinnoissa teoreettista liikehdintää.