Figure 3.
Heat map. A heat map showing responses to a drag and drop question, enabling detection of learners’ strengths and weaknesses, as well as common misconceptions
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.