The First Buddhist Council with an aim for education was constituted in:

The First Buddhist Council was indeed held in Sattapanni, which is located in Rajgir, Bihar, India, after the death of Gautama Buddha around 483 BC.
Important Points

• The aim of the council was to preserve the teachings of Buddha, both his words (the Dhamma) and monastic rule or discipline (the Vinaya).
• 500 Arahats, or enlightened monks, are said to have attended the council. The most senior of them, a monk named Mahakasyapa, is said to have led the council.

This council was instrumental in the preservation and transmission of Buddha's teachings.

• The teachings were orally passed down and were not written down until the Fourth Buddhist Council in Sri Lanka in the 1st century BCE.
• While it's not generally described as an "educational" council, its purpose was essentially to educate the future generations of Buddhists about Buddha's teachings.
• In that sense, you could indeed say that it had an aim for education.

So, the statement "The First Buddhist Council with an aim for education was constituted in Sattapani in 483 BC" can be justified, with the understanding that "education" here refers to the preservation and transmission of the Buddha's teachings