The latest grammar rule I introduced to the Year 8s was the Arabic verb root system. Telling them that if they learnt this correctly, they would know 50% of Arabic seemed to do the trick. For me to have even gotten their attention after teaching them 6 grammar rules already was a massive deal. But Allah made things easy for me alhamdolillah!
I introduced the 3 Arabic verb roots as 3 roots of a tree. The fruit the tree has are the words that can be made out of the three roots. Obviously, it will take many more lessons to even get 50% of the class to grasp this weird and wonderful language concept.
Here is an activity I created to help the girls grasp an idea that we talked about related to the Arabic verb system: words are created using the three root letters and additional letters.
I hope you enjoy using this activity with your class insha Allah!