Cognitive training entails the repeated exercise of a specific cognitive process over a period of time to improve performance on the trained task as well as on tasks not specifically trained. Studies have shown that cognitive training can remediate deficits in children with Attention Deficit Hyperactivity Disorder (ADHD) as they commonly present with inattention and working memory deficits. In this case study, index client N.S. 11 years, male presented with core inattention problems however not meeting the ADHD diagnostic criteria and that would not be manifested in academic functioning and in school and home behaviour. However, standardized neuropsychological assessment like Wechsler Intelligence Scale for Children (WISC) and Test of Everyday Attention - Children (TEA-Ch) showed the deficits. The client was trained with a flexible combination of cognitive tasks tailored to target the deficit areas. The cognitive tasks addressed the areas of working memory and attention that included selective attention, sustained attention, focused attention, response inhibition and switching. Over multiple sessions the client showed improvement in the neuropsychological test (TEA-Ch), thereby showing efficacy of the flexible approach of cognitive training combining different cognitive tasks as per the need with subclinical attention problems.