Most countries closed schools and shifted to remote learning in March 2020. Students spend 4-8 hours less weekly during lockdown. Conservative estimates show weekly learning loss between 0.82-2.3% of standard deviation. Learning loss affects both cognitive and non-cognitive skills acquisition
IBO is a pre-university biology competition for students under 20. First held in Czechoslovakia in 1990, now includes over 75 countries. More than 1 million students worldwide participate annually. Winners from national competitions are sent to IBO with international jury
Dog Twitter plays a crucial role in social media during COVID-19 pandemic. Platform serves as a platform for dogs across all social media platforms
Global travel and tourism reached $8.9 trillion in 2019. Most popular destinations are located in Europe. Waterfront countries offer relaxed atmosphere and beaches
Over 1.2 billion children worldwide are out of classrooms. Online learning platforms like BYJU'S saw 200% increase in new student registrations. Tencent's platform reached 730,000 K-12 students in Wuhan
Infection fatality ratio (IFR) estimates deaths among all infected individuals. Case fatality ratio (CFR) measures deaths among confirmed cases. True transmission often underestimated due to asymptomatic cases