Hi Mouna,
I would structure the key takeaways into 3 buckets:
1) Key learnings about "case types": these are points you learned regarding the different types of cases that are interesting to have in the back of your mind (eg. for a profitability case, what are the most common variable and fixed costs that should pop up in your mind directly.... for a growth case, remember to think of the Ansoff matrix to make sure your options are MECE)
2) Key learning about "industries": these are points to have in your mind whenever a case is regarding a specific industry (e.g., Whenever you are solving a case in healthcare, remember to assess how insurance companies could affect the solution....whenever you deal with airlines, remember to assess if splitting the trips between short/medium/long haul (and their respective beverage distance) could offer more insightful answers)
3) Key learning about communication: these are points to remember whenever you want to structure and present your opening/closing statements (e.g., pyramid principle)
Additional notes could include math tricks to help you with your arithmetics.
I hope this helps, feel free to reach out for any additional help.
Best
Khaled
Thank you Khaled, exactly what I needed!