Your question: Are the books self-contained or do I need to buy other stuff like calculators, manipulatives, etc.?
Let's answer all of those questions . . .
Are they self-contained? All are of the answers right there in the book?
Yes.
All of the Elementary Series books have all the answers included.
LOF: Fractions; LOF: Decimals & Percents; LOF: Pre-Algebra O with Physics; LOF: Pre-Algebra 1 with Biology; LOF: Pre-Algebra 2 with Economics have all the answers included.
LOF: Beginning Algebra Expanded Edition has all the answers included.
The same is true for LOF: Advanced Algebra Expanded Edition and LOF: Trig Expanded Edition and LOF: Geometry Expanded Edition and LOF: Linear Algebra Expanded Edition.
LOF: Calculus Expanded Edition and LOF: Statistics Expanded Edition have all the answers included.
Calculators?
Once past the arithmetic books and into the second pre-algebra book (Life of Fred: Pre-Algebra 1 with Biology), you can pick up one of those cheap (maybe around $5) calculators that has +, –, x, divide, and square root keys.
Once into algebra, you make the "big" purchase of a scientific calculator that has "sin" and "log" keys. (Certainly, under $20. I got one on sale once for $8.)
You do not have to get one of those graphing calculators that cost around $100. I have a Ph.D. in math, and I've never owned one. It's an insane and budget-busting expense that government school systems like to impose on their students. In the Life of Fred algebra and trig books, I will show how to graph all that stuff that the fancy graphing calculator can graph—and all it costs is the price of pencil and paper.
Manipulatives?
No.
Extra test books?
No.
Teacher books?
No.
CDs, DVDs, Computers?
No. The only electrical thing you need is a light bulb.
     One of the most important skills we want our high school kids to  acquire is to learn how to learn by reading.  In kindergarten, 99% of  what kids learned was from the teacher's mouth.  As they progress up  through high school and college, increasingly they learn more and more  by reading.  
          I know it isn't easy for some to learn how to   read.  For those kids, it is more important that they be encouraged to   learn that skill.
          After they graduate from the university,  for the next 40 years almost all of the technical things they will  learn will be by reading—and not by hearing someone lecture.  We want  to prepare them for adulthood. 
      
          For five years in the   1990s, I produced a weekly television series entitled Stan Now Considers   All Things.  It began as a 30-minute program and in the later years   became an hour-long program.  I was my gift to the community.  Each program consisted of 3-5 minute   segments around the themes of history, poetry, the Bible, math,   philosophy, sociology, science, art, . . .   There were 15 subjects.  I   would dress up, often with wigs, etc., and do the presentations.  I also   did the editing and wrote the scripts.  
          In other words, I   could easily turn the Life of Fred series into DVDs—if I wanted to.  But, in the long run, I think it would be harmful   to our students.  God calls us to   love—not just with our heart—but also intelligently.  Our kids have   got to learn to read.
    
             
Pizza oven?
Recommended but entirely optional.
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