After a long time I took my sim to university. I forgot how insane the performance bar is! If the sim is not currently studying the bar keeps going down!

So being a gardener is must have for uni student because wonderpetal herb will boost the studying

Sims put on a cowboy costume when riding the rodeo bull.

The bar also goes up while you are working on a skill for that specific degree. Like if you are working on charisma and are there for a business degree, your performance goes up. You may end up getting a bigger boosts from upping a skill related to the major rather than studying. Luckily the bar is frozen on the weekend so you can do other things like meet people- or ignore people and work on other skills.

Thanks I will try this!