Worked-out-examples -a special type of learning tasks, which are due to foster individual learning in Science Abstract: Worked-examples consist of a problem task, several -more or less worked out -solution steps and the answer to the problem task itself. If worked-examples are well designed, they are likely to be used as tasks for students especially with weak abilities in one domain. Also, these examples can be solved by students without supervision (e.g. as homework, for independent revision tasks, etc.). The following article starts with a short theoretical background and some evidence in research regarding learning with worked-examples. Afterwards, it shows how worked-examples can be developed for learning chemistry content.