Follow these two important tips 1 – Keep them hydrated! The brain is 80-85% water. Water transports oxygen to the brain & gives it energy to function. So when your child is well hydrated, they can think faster & focus better. Dehydration reduces brain function & has a clear impact on concentration & cognitive abilities. 2 – Reduce added sugars Brain functions such as thinking, memory, and learning are linked to glucose levels. Too much consumption of processed sugars causes a spike in glucose, which directly affects the brain's ability to learn and remember information. As a result kids struggle to concentrate.