Again, no textbook meets standards, except the ones placed by college educated elites. The best textbooks in the world can not hold a candle to a teacher that can light-up a classroom.
I know, when I taught Digital Electronics, I told my students that if they open the book other than to answer the questions, they wouldn't learn a thing. I invented a method of converting decimal to binary in seconds, made karnaugh maps a breeze, and we built fighting robots at the end of the class. The students had the time of their lives.
When I taught computer repair, there wasn't one textbook on the market that was close in covering the skills that they would need. I told the students that the books they were force to buy were for reference only. Ditto for networking technology.
We did at least 25, usually 30 problems per day in each Saxon lesson.
Practice problems on material learned that day (about 5), then 20-30 more problems to solve that included new concepts plus mixed review of familiar concepts.
You sure you're talking about Saxon????