Love the updates

Just want to start off by saying I love the new looks and added features. I have been using your products for about 2 years now and they have always been my goto calculator. As a high school math teacher I have already shared your apps with others especially since many of my students cannot afford a TI graphing calculator, these applications are the best of alternatives. Now onto a few suggestions and fixes.

1) Under the References, Geometry, Ellipse Basics I have found that the image is missing and only has the rectangular box that shows there should be something there. Please fix.

2) Could you add under the references on matrices, how to by hand find the determinate of a matrix, 2X2 3X3 and larger say 4X4 or 5X5, and what a determinate is. Since matrices are now taught under the Common Core this will be a great help inside and out of the classroom.

3) Can you add under the references on Vectors, finding a normal vector in relation to things like two other vectors, a plane, and through a point on a curve or plane. Explaining how you would do this by hand and provide examples please. Also taught under the Common Core.

I love having these quick references, so thanks again and I look forward to all the other additions you are planning.

Asouka about EduCalc Pro