My youngest two are two years apart (grades 5 and 7) and the youngest is now 2 years ahead of the middle in math (the middle is in Alg 1 in public school, the youngest in Alg 2 in an extra weekend class). It's a huge source of misery to the middle one, but we just didn't feel like we could hold the youngest back to spare his feelings, since it's an area of passion for the youngest and just boring and uninteresting for the middle. We have a lot of conversations with middle about how people have different interests, what happens when somebody puts hours and hours into a pursuit that they love, his own particular strengths and talents and interests, drawbacks to being overly specialized, etc. A lot of conversations!
