The first task for students is to open workbooks and write the title "Decomposition of expressions into product". The teacher does not control the adjustment, it is at a very different level for students. Different members (eg 3a ^ 2 bc ^ 3) are prepared on the board on a separate A4 paper. It is attached with magnets, so it is possible to put any two members together, add a sign and create the whole expression.
Various members are prepared on the board (eg