So often, we see students transition into the IB program and struggle initially simply because they lack the study skills to be successful. They lack them not because of low intelligence or low ability; They lack them because they simply have never needed them before. As counselors, we see this much more often than one would think. There seems to be some proverbial wall that most bright students hit once their natural talent can't get them straight A's anymore and the effort has to kick in. This wall is often so overwhelming to many students because they are intimidated by hard work. That's not to say that with hard work will come with countless late nights and loads of stress. Those things might occur, but aren't the everyday norm, and can usually be overcome once students understand the value of the work they're putting in. Most are smart enough to figure out what needs to be done once they simply accept that the change is imminent.
I hope you find the linked article encouraging. If you have questions, see your counselor or your teachers for help on developing these skills. We're here for you!