A basic look at psychology will tell you that emotions can affect cognitive functions like the ability to learn. Considering modern science can pinpoint which parts of your brain control memory, language, etc. it's easy to see that emotional stimuli can change or alter the way these specific parts of your brain operate.
For children, who are constantly learning and developing, emotional stimuli interfering with cognitive development can be a major thorn in the side. That's why parents need to understand exactly which emotions can put the biggest damper on a child's education.Let's take a look at some of the emotions that have been said to block learning in children: