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United Nations Educational, Scientific and Cultural Organization (UNESCO), the United Nations Children's Fund (UNICEF), the World Bank and the Organisation for Economic Co-operation and Development (OECD) have collaborated in the third round of the Survey on National Education Responses to COVID-19 School Closures, administered by the UNESCO Institute for Statistics (UIS) and OECD to Ministry of Education officials. The questions covered four levels of education: preprimary, primary, lower secondary and upper secondary. While the first two rounds of the survey were implemented during the periods May-June and July-October 2020, respectively, the third round was implemented during the period February-June 2021. In total, 143 countries responded to the questionnaire. Thirty-one countries submitted responses to the OECD ("OECD survey") and 112 countries responded to the UIS ("UIS survey"). Seven countries responded to both surveys. In these instances, the more complete set responses were used in analysis.

This paper presents a system integration approach for a 6-DoF (Degree of Freedom) collaborative robot to operate a pipette for liquid dispensing. Its technical development is threefold. First, we designed an end-effector for holding and triggering manual pipettes. Second, we took advantage of a collaborative robot to recognize labware poses and planned robotic motion based on the recognized poses. Third, we developed vision-based classifiers to predict and correct positioning errors and thus precisely attached pipettes to disposable tips. Through experiments and analysis, we confirmed that the developed system, especially the planning and visual recognition methods, could help secure high-precision and flexible liquid dispensing. The developed system is suitable for low-frequency, high-repetition biochemical liquid dispensing tasks. We expect it to promote the deployment of collaborative robots for laboratory automation and thus improve the experimental efficiency without significantly customizing a laboratory environment.