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Olimpíada Brasileira de Biologia


Portuguese (Brazil)

Our Olympics begin enrollment to schools in October . Schools can register until the start of the school year (February) . Registrations of students is made only after the application of the first exam. The disclosure is made mainly on-line.

The Brazilian Biology Olympiad (OBB) is organized by Instituto Butantan. We applied three rounds of examinations selecting our Olympic delegation. The first round takes place in the registered schools and is applied by the high-school teachers. The first test has 30 multiple choice questions and has only eliminatory character. The first phase occurs in late February.

After the registration of students in our online system, cutting the selected students for the second phase is done. In our guidelines states that 5% of the best students are qualified for the second phase of the OBB.

The second phase contains 100 multiple choice questions and is applied by state coordinators throughout Brazil. After its application, answer sheets are sent for correction in Instituto Butantan. The fifteen finishers are selected for the third and final phase which occurs in institutions in Sao Paulo.

The third phase corresponds to 1 week of training and practical assessments. The top four students at this stage are selected to participate in the IBO. The fifth to eighth placed are selected to participate in the Ibero-American Olympiad Biology.

Every year  more schools and students participating in the OBB. Currently we have approximately 3000 registered schools and about 60,000 students who participated effectively in our first phase. Most participating schools and students in the public school.

The first two rounds correspond to test multiple choice . Only in the final phase of training and selection discursive and practical tests are applied.

State coordinators and teachers OBB friends assist in the making of the first two tests. The third and final phase is made ​​by teachers that participate in the practical training of students.

The training stage takes place over two weeks in April. Students classifieds are brought to Sao Paulo.

The training is organized by Instituto Butantan.


There is no specific material developed for training of students. In our homepage are available various tests of former OBB to better prepare students for the OBB rounds.

The fifteen finishers in the OBB receive medals and certificates of honor . The organization of the OBB understands that the two weeks of practical training are also an excellent prize students to achieve their classification.

The disclosure in the press is more restricted to impressive results in International Olympics.

There is always a highlight when Brazilian student returns with medals of IBO / OIAB .

Locally, the source states, the schools of the students qualified for the training phase fairly disclose its success thus posing positive marketing their institution .

The OBB has the most government source resources.

Every year the project is submitted to the CNPq, government's agency that foster research and education in Brazil.


The Ministry of Education and the Science and Technology supports the OBB.


The OBB applies rules identical to IBO regarding students who can participate. Students duly enrolled in high school as well as 19-year limit are the only allowed to participate in the OBB. Our tiebreakers prioritize public school students , younger students, and students from states or schools with less representation.

Sonia A. de Andrade

Av. Vital Brazil, 1500. 05503-900 Sao Paulo - Brazil.

Instituto Butantan

Over the past 13 years OBB managed to stabilize the number of participants at about 60K students.

Currently about 3000 schools from all states of Brazil apply to OBB.

Over the years there has been large increase in the participation of Brazilian public schools in the OBB.





by BR_odarub last modified Jan 10, 2018 11:14 PM