Skip lesson results/completion

How can I have my users view a lesson, and then go directly to each subsequential lesson, without having to click a "finish" button? I want them to skip over the Lesson completed/question results page. For example, when they are on slide 1 of lesson 1 at http://qa5.rtd.asu.edu/node/47/take, there is only a green "finish" button. How can I avoid the next page, or just change this finish button to be a "go to next lesson" button that would then take them to http://qa5.rtd.asu.edu/node/48/take? Thanks!