This study sought to answer if the Home Instruction for Parents of Preschool Youngsters (HIPPY) program had a positive academic impact on Hispanic English language learners (ELL). HIPPY is a free, 2-year, home-based early intervention program for 4-and 5-year-old children. The program is intended to provide educational enrichment to at-risk children from poor and immigrant families, increase school readiness, and foster parent involvement in their children's education. A quasi-experimental design and quantitative measures were used to measure the academic success of Hispanic ELL students in reading, mathematics, and language arts. The sample included an experimental group and a purposeful control group. Hispanic students who attended an early childhood school as 4 year olds and participated in the HIPPY 4 and 5 programs were compared to Hispanic students who attended an early childhood school as 4 year olds and did not participate in HIPPY. Results from the Texas-mandated criterion referenced Texas Assessment Knowledge and Skills (TAKS™) Test and the TerraNova® and TerraNova SUPERA® norm referenced tests were used in this study. Results from the TAKS Reading and TAKS Mathematics Grade 3 and the TerraNova reading, language, mathematics, and total composite scores were analyzed using a one-way analysis of variance. The treatment group and control group results from both assessments were measured and compared. A statistically significant difference was found in 5 out of the 6 null hypotheses tested. The treatment group statistically significantly outperformed the control group in the TAKS Reading and the TerraNova and TerraNova SUPERA reading, language, mathematics, and total composite assessments. This study substantiates that the HIPPY program works and can have a positive impact on a child's school readiness. Additionally, a significant range of sustainability was also established since the results were measured from assessments administered in the third grade and 5 years after the treatment group began participating in the HIPPY program.