K.T.
I have the exact situation. Same age, same circumstances. One response questioned the reason to mention sports. When faced with this dilemma, it is extremely difficult to understand when you haven’t lived it. In my case Boy A is good at everything, and B struggles just with the day to day. When it comes to holding B back, I have talked to many teachers about the pros and cons. As one poster commented her twin eventually caught on without being held back. I know my B will never be at the same social level as A, but I trust the opinions of those with many years experience. I feel B will struggle more in school explaining why his twin is a year ahead of him than if I just give him the time to catch up. This is the decision I am making, but you are their mom and you know better than most. We all need help though. I hope it helps to know you are not alone in this.