original lesson https://vle.learning.moe.edu.sg/lesson/view/7448bde4-1441-4ca2-8629-062bf43bea14#page-0  

This lesson is designed for Secondary Four Express and Five Normal Academic students doing Physics, for first time learners.
  • You must be able to state the properties of magnets.
About this lesson package:
This lesson package consists of
  • A simulation to determine the magnetic field pattern of a bar magnet [5 min]
  • A simulation to plot the magnetic field lines of a bar magnet [5 min]
  • A quick check to extend the drawing of field lines to two interacting magnets [5 min]