N.P.
Hi S.: I teach science (chemistry, biology etc.) and maths. Today, algebra is not taught with formulas as I learned it in high school but it is taught more with graphs and calculators. That is a problem for you if you learned it with formulas. I have found so many fabulous algebra websites that you could almost teach everything from one of these. I know nothing about the pen and never heard of it but it could be fabulous for sure. I strongly suggest that you find a fun site for her and see some of the teacher-made web sites also. Many of these web sites would explain completely how to do the problems. Also, sometimes one person can explain a solution and the student doesn't understand but hear it another way and there can be comprehension. Hang in there - go to Annenburg Foudation - they often supply videos on line that really explain. God bless you and your family.