BestEvidence produces online learning materials to help users learn how to critically appraise different study designs. Learning materials can be general for any learner or learning materialsadapted for different specialties by using papers specifically relevant to a speciality, such as nursing or cardiovascular disease, can be commissioned. These take people through both the theory and practice of critically appraising each particular study design (such as randomized controlled trial, economic evaluation, a qualitative study). The learning materials associated with each study design take between 45 minutes and two hours to complete and are problem-based and interactive. They are broken down into smaller, e.g. five minute, learning bites, so that the learner can take advantage of brief opportunities for learning. Each module has a self-administered quiz with detailed feedback so the user can assess and reinforce their learning.