Amidst the general distractions of spring and end of the year fatigue it is easy for both parents and children become discouraged and questioning.
One particular area of
"Why do we need to do this.................
...............................square roots, algebra, metric system?"
To be honest, at times I have wondered the same thing. Sometimes you just want to say "Let's just call quits on the parts of that cause such struggles within our homeschool."
Here is a link that addresses those questions. While some of the comments are a little off base, read them for the gems they contain.
This is an article from Math Mammoth's author Maria Miller
It also includes links to some resources you will want to investigate.
Read this and share it with your students, especially the high school students. While I had not thought of all the reasons recently, it is true that algebra is needed for any science field, any medical field - especially the practice fields of nursing!