here is some info for you
Here is another site full of info about popcorn ceilings.
Hi Laura if removing the popcorn doesn't work out you might consider just covering them up. You can purchase Styrofoam ceiling tiles now that weigh almost nothing that you can just glue up and paint afterwards as well. https://www.hometalk.com/29254181/covering-up-a-very-ugly-ceiling-with-styrofoam-ceiling-tiles
Have you considered covering them instead of removing them? Here's an example of some tin tiles you could use to cover. Or go for the less expensive cardboard option and spray paint them with metallic paint. http://entriwp.com/2015/02/05/tin-ceiling-tiles-reflect-light-brighten-a-room/
This how to video shows you how to remove the popcorn ceiling: https://www.youtube.com/watch?v=ktO8VMdH_04
This scraper is great:
Saturate with water first, then use the scraper. Make sure to protect yourself and walls & floors. This makes a big mess, no matter what method you use.
Here are some ideas: https://www.hometalk.com/search/posts?filter=popcorn%20ceilings
This is a great tutorial https://www.youtube.com/watch?v=ktO8VMdH_04