The Swiss 3RCC has compiled a dedicated webpage of organisations active in the promotion of the 3Rs who have added online training material on their websites:
NC3Rs – National Centre for the Replacement, Refinement and Reduction of Animals in Research offers different e-learning resources, experimental design resources and for example information on housing and husbandry.  
Labroots offers virtual events and webinars on a range of topics related to the 3Rs. You find keynotes on different in vitro disease models, in silico toxicology and animal models, enrichments, ways to improve reproducibility and the ARRIVE guidelines, which help you improve the design and reporting of animal research. 
CAAT (Johns Hopkins Center for Alternatives to Animal Testing) offers podcasts and free webinars on alternative methods. They include events on how to minimise the use of animals in toxicity testing, how to move beyond animals in the neurosciences and infectious disease research. The 7th Annual 3Rs symposium, co-hosted by the USDA Animal Welfare Information Center (AWIC), NIH Office of Laboratory Animal Welfare (OLAW), the Johns Hopkins Department of Molecular and Comparative Pathobiology, and the Johns Hopkins Center for Alternatives to Animal Testing (CAAT), will be held online on June 4-5, 2020. One of CAAT's experts has published a video where he explains how his group is using its in vitro minibrain models to study the effects of SARS-CoV-2 on brain cells.  
SYRCLE The SYstematic Review Center for Laboratory animal Experimentation at Radboud University Medical Centre in the Netherlands offers tools and guidelines for the conduct of systematic reviews of animal studies. 
Eindhoven University of Technology offers a free online statistics course. Instructor Daniel Lakens explains how to design experiments and select your sample sizes so that p-values, effect sizes, confidence intervals and likelihood ratios can answer your research questions. Participants also learn how to interpret evidence in scientific literature given the widespread publication bias, how to perform replication studies, why you should pre-register your experiment and publish it open-access.
The 3R Smart is an information and training platform, which addresses interested laymen as well as scientists and technical staff. The project is funded by the German Ministry of Education and Research (BMBF) and coordinated and developed by the University of Veterinary Medicine Hannover Foundation and the Philipps University Marburg. 
NORECOPA: Norway's National Consensus Platform for the advancement of the 3Rs suggests resources, which may be suitable for schoolchildren and undergraduate students undertaking home learning in connection with the Covid-19 pandemic. Emphasis has been placed on products which are available online, thereby avoiding the need for purchase of equipment. You may find alternatives to dissections in the NORINA database with suggestions on how to replace the use of rats or frogs.
RAT – Research Animal Training (formerly Flaire Learning) offer e-learning modules to support researchers applying for licences in the U.K., but that are also of interest to scientists in Switzerland. The articles and eLearning modules on the RAT site align with the learning outcomes specified for EU training modules. Some learning outcomes require practical tuition, and this should be provided in person. Further information for course attendees, a listing of the eLearning modules currently available, a website feature list, FAQ page and some example screens . 
BIH – Berlin Institute of Health has created a list of resources to help you make the best of this strange and challenging time and increase the quality of your research in the future. 
GV-SOLAS – The German Society of Laboratory Animal Science will organise two livestream events at the end of April. The 49th seminar on laboratory animals and animal research will take place on April 28th and 29th, and the 13th training event of GV-SOLAS for animal welfare officers and members of authorities will take place on April 29th and 30th
SIB – Swiss Institute of Bioinformatics experts are taking part in the global effort to develop dedicated data services, analysis tools and improve knowledge sharing to fight the COVID-19 pandemic. Find a list of tools and resources on a dedicated website of the SIB. 
ASCCT – American Society for Cellular and Computational Toxicology holds webinars on new animal-free testing methodologies. The webinars are available for all to attend and watch at no cost.