How can I learn to skim and scan?
Skimming and scanning won't help you answer the Reading questions, but they will help you know where to go look. Just like you know exactly where to find the honey and the coffee in your favourite supermarket -- you can go directly to the correct aisle, which saves you a lot of time when you're shopping.
There are some lessons in the Bonus section of the Reading Academy course to help you develop these sub-skills.
You can also use the Recorded Live Reading Lessons to see how different teachers use these sub-skills.