Millions of lessons –
The Lesson Calculator
How big is the opportunity for your school/your organisation
How many lessons can systematically be improved per academic year?
What would it mean for your pupils/students if X % of all your lessons would be systematically improved based on evidence and research?
** X teachers. 4 lessons per teacher and per school day. 183 school days per academic year.
Average for the OECD countries: 185 (primary schools) and 183 (secondary schools).