i can imagine a team of learners discussing topics on:

1. trigonometry

2. parallelogram law of additional of forces

3. current law of current carrying wires

4. same direction current wires attract & opposite direction current repel

5. logic thinking of bisecting/dividing the angle made by forces line of action

6. comparison of 3 inequalities relationship/equation

7. drawing conclusion thinking skills

i like this because it is interesting, requires many skills to solve problem