CTRL-B is a platform where teachers create and store teaching-learning resources that can be used in the classroom. 

The learning activities are made according to the pedagogy of predict, observe-test-explain and based on the theoretical basis of case-based reasoning. 

These resources are an extension of Karyotype- a technology-enhanced learning environment for clinical diagnosis of genetic disorders. 

The resources are aimed at supporting learners sensemaking and connecting the theory to practical by providing authentic learning scenarios.