The bachelor's thesis titled Speech Therapy Worksheets for Preschool Children with Dyslalia focuses on the production and use of speech therapy worksheets in speech therapy intervention within a speech therapy class of a kindergarten. The theoretical part of the thesis defines important concepts in the field of speech therapy, the ontogenesis of speech, language levels, communication disorders and their categories, and dyslalia—its etiology and classification, diagnostics, therapy, and prevention. The practical part of the thesis is focused on the production and evaluation of the effectiveness of speech therapy worksheets. This work provides speech therapy materials that can be used by both parents for home practice and speech therapists for speech therapy intervention.