“During our field trip, the teacher asked Maya to lead the group through the museum. She walked at the front, guiding the others past paintings and exhibits. Later, in science class, the guide showed us an old water pipe made of lead and explained why the heavy metal was no longer safe for use in homes. That evening, my brother practiced his lines for the school play. He had the lead role and needed to remember every word perfectly. The next morning, we read an article where a runner held the lead in a marathon until the very last stretch.”