To be fair, those things did transform education.
- Radio enabled students to study the ever-changing reality of modern global events, rather than merely studying literal "textbook cases", supporting a paradigm of learning by observing, rather than learning by prescribed theory.
- Television, in addition to carrying on the benefit of radio, shows students the world rather than simply referring to points on a map. Different cultures and environments can be described in full color with fluid video, rather than hoping the student understands a short text description that too often seems absurd due to its foreign context.
- Language labs are still in use today, if the school can afford the high cost to keep them running. The transformative techniques they pioneered are actually seeing more use in specialized environments where a pre-built curriculum is sufficient to teach a skill, such as for technical training.
- Personal computers were a major factor in changing the educational process into a full-time occupation. Where students used to have only a bit of homework to do each night, now everything children are exposed to is pushed as an "educational opportunity". This, in conjunction with the increased rate of information transfer that a computer supports, exposes students to far more educational information than previous techniques support. Considering the exponential increase in the about of information considered to be part of a basic education, this is a good thing.
- Laptops, especially as they're penetrated the corporate environment, have become a vital tool in university courses. Now, the educational focus is less about absorbing every detail presented in the class, because references are always available. It's the overall concepts that are important, with the details deferred until later.
- Tablets have taken the successes of laptops further in places where a full portable computer isn't really necessary. One notable example is a teaching hospital, where the tablet provides a convenient addition to the ubiquitous patient charts, providing quick access to a senior's opinion and reference material. They've also shown significant benefit in early-childhood development, as a ruggedized tablet can provide more interaction (and therefore hold attention better) than a TV show or adult's presentation, while still introducing the basic elements of language are mathematics that the rest of the child's educational career will build on.
- Virtual worlds have not seen much use directly as formal educational tools, but they have become a more convenient form of extracurricular study groups. Where previously such groupd would meet in a library, bar, or colleague's house, it's now more convenient to meet in a virtual space. Depending on the subject, the degree of interaction required varies.
- The gamification of education has a long history, actually dating back to the "ancient classroom of Rome or Greece" that you mentioned. Plato and Socrates used verbal and logic games, encouraging students to discover answers rather than simply accept what was given to them. In the Middle Ages, chess was used to teach military strategy, highlighting the strengths and weaknesses of various forms of attack.
- Finally, tape recorders opened the doors to whole arsenal of educational techniques, ranging from pre-recorded lectures to verbatim note-taking. The use of pre-recorded materials avoids teachers fumbling through an exercise, while also breaking up the lesson into manageable sessions that the brain can process more easily.
Perhaps the most important educational transformation brought about by technology has been the effect of all of these combined. Indeed, today's classrooms and classes look nothing like ancient Rome or Greece. Those ancient students had to carefully choose their teachers, lest they be taught principles that the government had banned. If a student didn't understand the teacher's presentation, they had no alternative resource. Even as late as the early twentieth century, the teacher was the sole source of all formal knowledge for the student. A persuasive teacher could bring order or chaos to a town. It's not surprising they were expected to hold such high moral standards.
Today, thanks to modern technology, education is focused on being less focused. Students are given a wide overview of the world, and expected to make their own choices through it. The teacher is expected to serve mainly as a curator and aide to present the world to the students.