News & Resources
Grading Geometry Proofs
Question from Derek: I am considering your Geometry program for our children. However I am not convinced yet that I could grade geometric proofs fairly, consistently and accurately. Since proofs have mutiple possible correct answers depending on how the student writes...
Algebra 1 Multiple Productions of DVDs?
Question from Chelle: About the Algebra DVD's.... Has there been multiple productions? I'm thinking about purchasing from a friend and wanted to make sure I got the most current edition. Thanks! Answer from Dr. Callahan: Only one production, so you should be fine. The...
Algebra 1 Ch11.2 #5
Question from Chris: Algebra 1 chapter 11 lesson 2 problem 5h: I see that you can cross out the (x + 7) in the numerator & denominator to get 3 /(x +3). Why can't you simplify further by cancelling 3/3 so that the final answer is 1/x? Thanks Answer from Dr....
Geometry Ch10.R #14
Question from Rene: Geometry - Chapter 10 Review #14 answer book says x=12.8, but we get x=5. What do you think? Answer from Dr. Callahan: Yes - a bit deceptive here. I think yours is reasonable. However, he is going by this. The long side of each is X and 8...
Algebra 2 with Trigonometry vs Precalculus
What's the difference between Algebra 2 with Trig and Precalculus? Here is our view… Algebra 2 with Trigonometry and Precalculus are usually the same thing with very little difference. If you put the Alg 2 with Trig book and the Precalc book by the same...
Geometry Material Skipped in Chapters 12,13, 15, and 16
In Harold Jacobs Geometry we skipped over material is chapters 12, 13, 15, and 16 because 1. It is not needed for ACT/SAT nor future math classes, and 2. it is a overly complex for the course at this level. Our recommendation is that the student look over this...
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