Education of adults with intellectual disabilities in labor activities can help them to successfully and repeatedly carry out their work tasks and significantly help their self-realization. The problem is that the need for frequent repetition of already learned skills requires the constant presence of a teacher or caregiver since such a worker is not able to work independently. This situation increases the cost of employing people with disabilities. The aim is to find a way to reduce the necessary number of caregivers needed in this kind of activity and enable greater self-sufficiency of workers. The presented research intended to verify whether a web course could be an effective educational tool for people with intellectual disabilities. During the research, a group of ten participants with intellectual disabilities was educated to acquire basic skills in horticulture. The first teaching was realized through practical demonstrations at the workplace in the university production garden by professional gardeners. After these demonstrations skills of all participants were verified and so the basic level for further verification and comparison of knowledge was set. Subsequently, using three approaches of repeating the already learned practical curriculum (verbal repetition, no repetition, and repetition using the web course) and different time intervals, the level of knowledge of each participant was verified. Statistical methods were used to compare the results of different repetition approaches. Research results demonstrated that a web course, with specific content that consists of video or animation, combined with the use of pictograms for confident navigation, can be used by people with intellectual disabilities with good results. At the same time, in addition to practical teaching, this was the second best-rated approach of repeating knowledge. Using a web course, participants achieved similar work results as they did in practical teaching.