Optional extensions push students to artistically represent the impact of comets, incorporating commercial and graphic arts. Business and Management students are prompted to analyze and prioritize as they select equipment for a task under time constraints in "Mastermind." General career skills can be developed using many of the presentation extensions. Teachers can add career-technical focus to their earth science lessons by digging through the site just a little. After selecting a lesson, teachers should select the teaching tips option and then the lesson plan link. Scrolling down through the lesson plan will reveal varied extensions and connections to art and management.