Dear boys, here are some websites to help you in your homework on pre-1819 Singapore:
http://www.collectionscanada.gc.ca/education/008-3010-e.html - This is a great website!
http://www.princeton.edu/~refdesk/primary2.html - This is a brief one
Here is a quiz to help you check your understanding!
http://www.historyonthenet.com/Sources/primary_or_secondary_source.htm - Do this quiz first
http://www.slideshare.net/jjgarcia77/primary-source-quiz-presentation
Have fun and all the best! By the way I will conduct a quick quiz on sources during the next SS lesson.
