"Google and the Comparative Constitution Project have launched a new site called Constitute. The site hosts the constitutions of 160 countries. You can search the site according to country and or constitutional theme. Searching by constitutional theme is the best aspect of the site. More than 300 themes are outlined on the site. Select a theme then a country and the element of that country's constitute addressing your chosen theme will be highlighted."
This new website provides a tool that will allow students compare constitutions from various countries and find similarities and differences. You will also find tags, over 300 of them, so you may choose to search by a specific tag such as "right to privacy" (found in 156 constitutions) or "right to bear arms" (found in 5 constitutions).
This site may be a great resource for history and social studies as courses in government.