Grade 9: We completed the topic motion and started a new one, Matter and Forces. We discussed the differences between mass and weight, effects of a force and carried out an experiment to determine density of regular and irregular objects. 
Grade 10: completed Energy transfer and we’ll start a new topic on Wave Properties in our next lesson.
Grade 11: Winding up on Measurements and uncertainties,on track to begin a new chapter on Vectors and Scalars.
Grade 12: Completed first part of Energy Production. We’ll start the second part in our next lesson.