(I understand 3D math in general; but vague on shader math and syntax - I’ve made minor changes to existing shaders over several years, but that was all in XNA 3.1 for some old DX version. I never “mastered” that old shader version.)
I know about:
And I just found, but have not read yet:
HLSL Introduction
Effects and HLSL Tutorials - RB Whitaker's Wiki
http://www.catalinzima.com/xna/tutorials/crash-course-in-hlsl/
DirectX10 Tutorial 9: The Geometry Shader | Taking Initiative
http://www.riemers.net/eng/Tutorials/DirectX/Csharp/Series3/HLSL_Introduction.php