Better scaffolding around internet searching for answers

[kescobo]

Currently

• I emphasize searching for answers on the internet is good and right
• I mention which websites often give good answers
• I occasionally prompt in assignments and in lectures that it's a good idea to search

The problem

• I don't give many examples of how / under what circumstances to do this
• I give minimal guidance on how to look through pages to find an answer
• Not always clear what parts of a question should be known and which should not

Possible fixes

• Provide multiple demonstrations of how to look for answers in lectures
• Include a lab and/or questions in assignments that have a bunch of explicitly not-previously-learned things that need to be implemented.

cc @jmachiuch