2018, Early Childhood Australia Inc. All Rights reserved. THIS ARTICLE AIMS TO DESCRIBE the level of implementation (LOI) of the Jump Start study, and examine the relationship between LOI changes and the support types provided to early childhood education and care (ECEC) centres. Direct observations were conducted in 21 ECEC centres at six months and 12 months after the start of the intervention. Each centre's LOI percentage was calculated and classified into high, medium or low implementers using objective criteria. Support strategies were determined by LOI at first observation. Pearson correlations between the support types and LOI were calculated using SPSS Statistics (version 23.0). In most cases (86%), ongoing support led to an increase in LOI, 17.5% on average. Phone calls were the only type of support significantly related to the positive LOI change (r = 0.532, p = 0.013). It was difficult to detect other effective support types due to the combined and small variance in support types provided to each centre.