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Christa Challita started their work experience at Rosary Sisters School in 2018. Christa worked as a Biology Teacher from October 2018 and as a Chemistry Teacher from September 2019. In 2020, they became a Private Tutor. Additionally, they worked at UNHCR, the UN Refugee Agency, as a Science Teacher from December 2019 to October 2020, and as a Health Counselor from October 2020. Lastly, they also worked at Rosary Sisters School as a Private Tutor for students with learning difficulties and disabilities from September 2018 to June 2019.

Christa Challita earned a Bachelor's degree in Life and Earth Science from Lebanese University - Faculty of Sciences, from 2015 to 2018. Christa then pursued further education and completed a Master's degree in Cell/Cellular and Molecular Biology from the same institution, from 2018 to 2019.