[PDF] Creating a Top-Down Topic Web - Keys to Literacy Creating a Top-Down Topic Web. The Keys to Literacy topic web provides a “big picture” in a visual format of information that must be learned through reading or listening. The format for these topic webs is top-down, with the broadest ideas at the top. This format reinforces the hierarchical relationship between topics and sub-topics. Top Down Topic Webs - smore A top down topic web is a visual schema that helps students makes those connections. The connections among the big ideas presented in content instruction and reading material are easy to recognize in a top-down topic web.