APhO has 8 students in each delegation, while IPhO has 5.
The award system In 2001, the IPhO International Board accepted a new system of awarding the prizes. The new system, designed by
Cyril Isenberg and Dr. Gunter Lind was based on a relative number of contestants for each type of award, instead of the score boundaries defined by percentage of the best contestant's score. This was not acceptable for APhO, because the average level of contestants is different. The old system remained in power for APhO since the beginning up to 9th APhO in Mongolia, where the leaders voted for replacing it by a new award system suggested by Dr. Eli Raz from the Israeli delegation. The new system, sometimes unofficially referred to as the
Israeli Award System, is based on a reference score that is the lowest between twice the
median score and the mean score of the top 3 participants. It was first used on 10th APhO in Thailand . ==Summary==