As someone who has has to read resumes to decide on who to employ, I agree keep it short, 1 page or 2 pages is ok. Longer, honestly, I skip sections or bin them. The most important thing is the resume must be clear, I do not want to spend time trying to figure out the important details, i.e. dates started, dates finished, schools worked at, qualifications obtained. Forget buzz words etc, unless you have evidence to back it up.
One million percent agree. And also please list your experiences and qualifications in reverse order. I want to see most recent first.
Another tip, and this may sound obvious, but do not lie. I recently canceled the contract of a teacher who had included false information on her/his resume. This includes degrees started but not completed, if you did not finish then state that you did not finish it- or don't include it at all. I recently read a resume that someone had listed a Master's degree with a start date as 2017 and finish date as 2019... it took me a minute to process what that meant.