IB has grown dramatically in the past five years. The "open door" policy of IB presumes the program is for all students, not an elite group of learners. This sounds so good that many schools go on board without all the preparation necessary, which includes being obliged to train IB teachers and to keep them current in terms of changes in the IB, which is done through workshops run by IB. Because the programs are expanding so fast, it's difficult for IB to keep up with monitoring all the schools. A good school will make sure its teachers are prepared.