With Lesley Judd and Ian McNaught-Davis. Twelve-inch laser discs had a short, unsuccessful life for domestic video, but the smaller compact discs have really taken off. Now discs similar to CDs can be used to store data for computers. But the larger video discs are making a come-back in 'interactive' systems, such as the one launched this week by the BBC's Domesday Project and are potentially ideal for education and training. If primary schools don't yet have video disc players at least most of them do have a computer. British educational software leads the world, but lack of teacher training and resources may mean it is simply not used. Kenneth Baker , Secretary of State for Education, spearheaded the introduction of computers in schools when he was Minister for Information Technology. Now he faces his critics over the lack of follow-up.