(L)earning (C)ritical (T)hinking (T)hrough (A)stronomy. Colorful and coordinate-free. I inhabit the cotangent space. Independent Scholar Working in Private Practice (ISWPP). AAPT Fellow. I maintain the mandi LaTeX package. I think all intro physics courses should include special and general relativity. Thirty years of physics and astronomy teaching experience. TeX/LaTeX/Python/VPython/WebVPython/SymPy/Overleaf