This Policy Research Brief examines changes in the availability of quality child care for low income working families -- in particular for families who were eligible to receive the child care subsidy. It compares this availability in 2011, prior to these new investments, and again in 2016, three years after implementing ExceleRate Illinois. Policymakers and advocates contemplating similar efforts in other states might find this analysis useful. In states that have already adopted such policies, similar measurements might offer informative comparisons. This is one of three briefs based on research conducted under the Illinois-New York Child Care Research Partnership (see Appendix 1) that examines changes in the supply of quality child care in Illinois available to subsidy-eligible families during the study period 2011 through 2016. (author abstract)