While the morning is normally the best time for a shoot, when children are older (and definitely when they’re teenagers) you may prefer later in the day as the sun goes down, which makes for beautiful light. It’s very different from a session with young children and the process is generally more of a collaboration.   Time on my own with each child or young adult avoids any self-consciousness, and I always find they love the experience, even if they may have agreed to it under duress..