[henrybar]

 Ca(OH)2(s)--->Ca^2+(aq) +2OH^-(aq)
 Since Ca(OH)2 is a strong base it can be said dissociate 100%, Concentration Ca(OH)2 is 0.0237 M so concentration of OH^- ions is also 0.0237 M but how do I find concentration of Ca^2+ ions? I cannot use ksp values because that is ultimately what im trying to solve for. Ksp=(ca^2+)(0.0237)

[Borek]

Concentration Ca(OH)2 is 0.0237 M so concentration of OH^- ions is also 0.0237 M

No.

Just look at the stoichiometry of the dissociation. How many moles of OH^- produced per every mole of Ca(OH)₂ dissociated?