Campbell Walsh was sick of waiting for his NAPLAN test results. ''I wanted to know how I'd done. It had already been about four months and I still hadn't got the results,'' says the year 5 student from Aitken Creek Primary in the outer Melbourne suburb of Craigieburn. In another era, Campbell might have been told to sit down and be quiet. Instead, his teacher, Bec Spink, suggested he post the question on social networking site Twitter. Campbell had an even better idea: why not tweet to the Prime Minister? Spink didn't skip a beat. ''Righto,'' she said.