Shear Force and Bending Moment Diagrams: This website is useful because it explains point loads and point moments. It also explains step by step equilibrium moments and forces, and it gives you a brief example of them and how to derive/draw shear forces and bending moment diagrams.
Bending moment calculator is specifically used for computing bending moment and shear force toward load that differs consistently with various intensities (highest on left side) on simply supported beam.
This construction video will teach you in detail how to discover zero shear ,maximum bending moment & point of Contraflexture.
Shear Force and Bending Moment Diagrams: This website gives a useful example of how to derive shear forces and bending moments using a graphical approach. It includes a handy little saying; "Watch your sign, keep your balance and draw your lines straight and true." Which means watch sign conventions, balance forces and moments, and draw Free Body Diagrams. Good Advice!