Like IKEA, a giant Swedish furniture-maker, Kunskapsskolan gets its customers to do much of the work themselves. The vital tool, though, is not an Allen key but the Kunskapsporten ("Knowledge Portal"), a website containing the entire syllabus. Youngsters spend 15 minutes each week with a tutor, reviewing the past week's progress and agreeing on goals and a timetable for the next one. This will include classes and lectures, but also a great deal of independent or small-group study. The Kunskapsporten allows each student to work at his own level, and spend less or more time on each subject, depending on his strengths and weakness. Each subject is divided into 35 steps. Students who reach step 25 graduate with a pass; those who make it to step 30 or 35 gain, respectively, a merit or distinction.

Again like IKEA, no money is wasted on fancy surroundings. Kunskapsskolan Enskede, a school for 11- to 16-year-olds in a suburb of Stockholm, is a former office block into which classrooms, open-study spaces and two small lecture-theatres have been squeezed (pictured). It is pleasant, but basic and rather bare. It rents fields nearby for football and basketball, and, like other schools in the chain, sends pupils away to one of two specially built facilities for a week each term for home economics, woodwork and art, rather than providing costly, little-used facilities in the school.

Teachers update and add new material to the website during school holidays and get just seven weeks off each year, roughly the same as the average Swedish office worker. "We don't want teachers preparing lessons during term-time," says Per Ledin, the company's boss. "Instead we steal that preparation time, and use it so they can spend more time with students."

Each child's progress is reported each week in a logbook, and parents can follow what is being studied on the website. And the braver among them will be keen on the expectation that the children take responsibility for their own progress. "Our aim is that by the time students finish school, they can set their own learning goals," says Christian Wetell, head teacher at Kunskapsskolan Enskede.