See the evidence
The research is clear: IXL is impacting 7 million students—including at schools near you
IXL is proven to accelerate learning
In 12 statewide efficacy studies, which are the largest of their kind, results consistently showed that schools using IXL outperform schools using any other product or method. Additional third party research has also demonstrated the positive impact of IXL on a variety of student populations.
The efficacy studies examined math and language arts data from state assessments, for all 42,940 public schools in these states. All schools using IXL were included in the study regardless of their amount of usage or methods of implementation.
IXL schools performed better than non-IXL schools on both the math and ELA sections of the California Assessment of Student Performance and Progress (CAASPP).
The expected number of students with proficient scores on the CAASPP would increase by 8.5% for math and 10% for ELA if students mastered one additional IXL skill per week.
The proficiency rate on the PARCC in schools using IXL for one year was 5 percentile points higher in math and 4 percentile points higher in ELA compared to schools not using IXL.
Schools using IXL for two years had a PARCC proficiency rate 9 percentile points higher in math and 8 percentile points higher in ELA compared to non-IXL schools.
Texas schools using IXL outperformed schools without IXL on STAAR exams, by as much as 11 percentile points on math, 17 percentile points on reading, and 8 percentile points on writing.
Schools using both IXL Math and ELA received better accountability ratings from the Texas Education Agency (i.e., showed higher achievement, made more progress, and closed achievement gaps better) than similar schools using just one IXL subject.
Schools using IXL for at least one year had an ELA passing rate 7 percentile points higher on the Florida State Assessment (FSA) compared to schools not using IXL.
In schools using IXL for two years, the math passing rate on the FSA was 15 percentile points higher in schools compared to non-IXL schools.
New York schools using IXL outperformed schools without IXL on the New York State Testing Program (NYSTP) and Regents Exams.
In 2013, schools using IXL for at least 3 years outperformed non-IXL schools by 13 points on the math Performance Index (PI).
By 2014, the PI gap between the same schools grew to 15 points. In 2015, the PI gap jumped to 18 points.
Schools using IXL outperformed schools not using IXL on the Standards of Learning (SOL) tests, by 5 percentile points in math and ELA, and this positive effect was even higher in low-income schools and rural schools.
Schools that discontinued IXL usage showed a performance drop on the SOL math and reading tests, by as much as 7 percentile points.
Schools that used IXL for one year outperformed schools without IXL by 7 percentile points in ELA and 3 percentile points in math on the Georgia Milestones Assessment System (Georgia Milestones).
Schools that used IXL for two years demonstrated even higher gains, outperforming non-IXL schools by 16 percentile points in ELA and 6 percentile points in math.
Thirty-two percent of schools using two IXL subjects and 30 percent of schools with one IXL subject improved their school performance grades on the North Carolina EOG and EOC exams, compared to just 18 percent of non-IXL schools.
Schools using IXL Math for three school years demonstrated increasing gains over time, growing by 3 percentile points in the first year to a growth of 7 percentile points in the third year.
Indiana schools using IXL outperformed schools without IXL in both math (5 percentile points) and ELA (6 percentile points) on the Indiana Statewide Testing for Educational Progress-Plus (ISTEP+).
The positive impact of IXL was even greater in low-income schools and urban schools.
Schools using IXL outperformed schools not using IXL on PARCC, by 4 percentile points in math and 6 percentile points in ELA.
The expected percent proficient on PARCC would increase 12% for math and 4% for ELA if students mastered one additional IXL skill per week.
On the Minnesota Comprehensive Assessments (MCA), the proficiency rate for Title I schools using IXL was 8 percentile points higher in math and 13 percentile points higher in ELA compared to Title I schools not using IXL.
Minnesota schools with at least 30% ELLs using IXL had a proficiency rate 7 percentile points higher in math and 12 points higher in ELA compared to high-ELL schools not using IXL.
Hawaii schools using IXL Math outperformed schools not using IXL by 6 percentile points on the Smarter Balanced Assessments (SBA).
The positive effect of IXL Math was even higher for low-performing schools (8 percentile points) and for schools located in towns or rural areas (12 percentile points).
Students Show Greater Growth on MAP Test with IXL
After practicing on IXL Math for one school year, 5th grade students in Iowa demonstrated larger gains on the NWEA MAP test, with 65% of IXL students exceeding normative growth, compared to only 41% of students who did not use IXL.
English language learners and students in special education programs made the most improvement compared to students without access to IXL.
IXL Improves Math Skills in Title I School
With the support of IXL Math and intervention groups, 4th grade students in a Title I school in Washington outperformed their peers and exceeded the district average on the Smarter Balanced assessment (SBA).
88 percent of students who used IXL met or exceeded grade-level standards compared to only 49 percent of students from the other Title I elementary schools in the same district.
IXL Drives Student Achievement in Math
IXL's effect on the Oregon Assessment of Knowledge and Skills (OAKS) math test scores is equivalent to 6.2 weeks of extra instructional time each year, according to results from a study conducted in an Oregon school district.
100 percent of teachers surveyed said that their students' confidence in learning math increased.
IXL for RTI Leads to School Turnaround
By incorporating IXL into their Response to Intervention (RTI) strategy, a rural high school in Kentucky skyrocketed from below the 5th percentile in state rankings to a 97th percentile state ranking in just two years.
By the second year, 30 percent of the high school Individualized Education Plan (IEP) students passed the state end-of-course assessment for Algebra I, compared to 15 percent statewide.
Improving Outcomes in a Before-School Math Lab
IXL boosted scores on the math section of the California Standardized Test (CST) in a Title I elementary school by 23 points.
After the school stopped using IXL, the school saw a 24 point drop on 4th grade CST scores in math.