Here are some of the best search engines to use when looking for flights:
Momondo- I think this is the best website to use to find cheap flights. It also has a useful visual chart to compare the best and cheapest days to fly. https://www.momondo.com
Kayak- While Kayak does not always have the lowest prices, becoming a member with Kayak will allow you to see Kayak's deals. The weekly deals are cheap if your schedule is flexible, but the emails can be annoying. https://www.kayak.com
Google Flights-This is a good search engine to look for destinations if you are not sure where you want to go. It compares destinations and prices on a map for an easy visual. https://www.google.com/flight
Map Chart- This website is great for creating custom maps and learning geography. Maps can be colored in by country or state, and can be labeled. The maps on this website were created on Map Chart, and I am quite happy with them. It is extremely easy to use as well. https://mapchart.net
Scratch Away Maps- These posters can be ordered on Amazon and are very handy for avid travelers. There are both international and domestic maps, some with scratch away flags on the bottom. Maps can be used to track travels or study geography.