Feeling unqualified is the first qualification.
If you don’t homeschool your children will be groomed by Sodomites. That is the state of our public (and even private) education system.
EVERY parent should be homeschooling ...
If you are Catholic I recommend Seton Home Study School. They have the whole package curriculum, and teacher support. Many classes have quarterly tests you send in and essays too. They do the grading and will issue a real diploma, curriculum approved in Virginia.
https://www.setonhome.org/
Hiisdale College has a K-12 curriculum that is supposed to be good.
Self ping
Math-U-See seemed very good for earlier grades but my kids excelled with Saxon Math, and I learned as I went too.
Saxon Math is the best.
We used Rod and Staff for English and phonics. Very solid stuff, definitely Mennonite oriented, very big on grammar and phonics, and very reasonably priced.
If you're smart about it you can teach them a foreign language before you teach them to read English. The brain is amazing for language learning during ages 3 and 6.
Getting started with older students will be more challenging. But the recommendation for khanacademy.org is right on, especially for math. HS kids can enroll in AP classes for whatever you need to test out of for college credit. This saves a lot of money and time, like two years worth ($40,000?).
Based on high school equivalency tests public school teachers bomb every year, most *teachers* are also unqualified to teach..
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I am a retired teacher and have earned the wrath of other "educators" by advocating home schooling for parents who want to take on the task.
First of all, I was a military dependent up through the 11th grade.
We were assigned to various locations in Europe where I attended DoD schools. In general, they were very good. However due to constant moves I had gaps in my education. My parents basically home schooled me by tutoring and assisting with my homework. They were 100% involved in helping me through rough spots where I didn't understand an assignment or had to catch up at a new school. That is passive home schooling.
Later, as a teacher I worked in a community with a strong military presence. So, I had empathy for the students that were transferred in and out of my classes. I advised the students and parents on subject matter they could pursue while moving to a new assignment. I also gave them material, a textbook and a syllabus to cover their transition period That was semi-active home schooling.
On a final note, in the classroom I could readily identify a student that has been home schooled. They were generally well adapted to dealing with adults socially, much more than the local peer group, had a better vocabulary and had a better understanding of STEM materials. This I surmised was because one or both of their parents were involved with a career that was based on math and science. Frequently a parent had a technical college degree, usually in the engineering field. IMO the parent has as much or more knowledge of a subject that any teacher had in the same subject area.
My wife homeschooled our kids and it was the best decision we ever made.
I would make a couple recommendations.
Join a good homeschooling group if there are any availalble in your area. The one we joined handled the paperwork that the state/county required and also offered legal protection just in case the state or county ever went rogue. It was great having people to get sound advice from.
Joining HSLDA is also an option if you want to have someone that can give legal assistance if needed.
One day a week the homeschool “academy” we joined offered a few classes that most parents would not be able to provide themselves. They also issued a diploma and had a graduation ceremony for the students. The cost was very low for the benefits we received.
Some states/localities have homeschooling curriculm fairs annually, often in the spring. Try to find them. They are a great place to shop for books, curricula and other teaching aids. You can buy used materials at great prices there. It’s a great place to see what’s available, talk to vendors and other homeschool parents. It’s also just plain inspiring to be in a large gathering of “bitter clinger” patriot parents with their children in tow! It was what radical was meant to be.
Public schools are state-sanctioned child abuse in MANY cases. Private and/or “Christian” schools frequently fall short by a lot.
Parents - do your duty!
Why trust the most precious thing (the soul and mind of each child) the LORD has entrusted to you to the care of pagans and idolaters.
You don’t have to be perfect. Just do your duty!