Suggest Remedy To Improve Concentration

Hello, I have a question about my learning capabilitys. Lately, i have been having the most terrible time trying to comprehend the material everyone is understanding. I feel as if i am the only one having the problem. When i am in class, i try to..lets say.. adsorb the information and material we are trying to learn. I can't seem to get engaged in learning. I feel helpless and going home or getting help isn't helping much either. what would you recommend?