1-Step Equations:

Instruction:

http://www.algebralab.org/lessons/lesson.aspx?file=Algebra_OneVariableOneStep.xml

video:  http://www.montgomeryschoolsmd.org/departments/itv/mathdude/MD_Algebra1_1-2.shtm

Practice Games:

http://www.math-play.com/One-Step-Equation-Game.html

http://www.bbc.co.uk/education/mathsfile/shockwave/games/equationmatch.html

http://www.aplusmath.com/Games/PlanetBlast/index.html

http://www.quia.com/rr/42586.html

http://www.mathsnet.net/algebra/l1_equation.html

http://www.aaastudy.com/equ.htm

http://www.math-play.com/Two-Step-Equations-Game.html

2-Step:

http://www.algebralab.org/lessons/lesson.aspx?file=algebra_onevariabletwostep.xml

http://www.xpmath.com/forums/arcade.php?do=play&gameid=64

Number of Solutions:

Video Instruction:
http://www.virtualnerd.com/algebra-1/linear-equations-solve/identity-and-no-solution-equations.php

Practice:
http://www.ixl.com/math/algebra-1/identities-and-equations-with-no-solutions