All Australian schools should have access to a bank of lesson plans under a radical proposal to reduce teacher workload, boost results and stop educators having to plan classes from scratch. A report by independent think tank the Grattan Institute has found 15 per cent of almost 2250 primary and high school teachers across the country have access to a common set of high-quality curriculum materials for all classes, and teachers in disadvantaged schools are half as likely to have access to shared lesson plans than those in advantaged schools.