Carolyn Terry found Mathletics:

• Significantly reduces teacher workload“Mathletics is good for teachers who run "stations". One group can be engaged in meaningful skills practice/revision whilst the teacher works with focus groups. It is also helpful when parents ask how they can support a home. It reduces the need to print worksheets for skills practice and avoids the need for teachers to mark these. Data is recorded in an easy to read format.”
• Slightly reduces attainment gap“It is easy to differentiate by placing and re-placing children on the different courses depending on area being taught or practised. Sometimes children are lower in some areas and higher in others, so they can be challenged in all areas at the appropriate level. Having questions read in different languages helps ELA children succeed in the challenge tasks.”
• Significantly improves teaching efficiency“Activities and challenges can be assigned quickly. Activities are self marking so children get instant feedback. Teachers don't need to mark and then record data. It is available instantly so action can be taken to address needs.”
• Moderately improves attainment“Children are motivated to practise instant recall and quick mental calculations in competitions with peers. Teachers are challenged to teach to curriculum expectations and can see when to re-assign tasks or extend students beyond curriculum expectations. Children are motivated to practise maths beyond maths lessons in order to gain rewards.”
• Slightly builds student knowledge“Concepts still need to be taught by the teacher. But videos within activities help to revise concepts that have been taught. Children learn to apply knowledge is solving various kinds of problems in different formats.”