Amie Coley found Arc Maths:

• Significantly reduces teacher workload“Arc Maths creates personalised questions for all students, using data from previously answered questions, to allow effective retrieval practice. If a student gets a question incorrect, the app stores this information and tests their understanding of the prerequisites to find the student's level they are currently working at. If a student answers a question correctly, the app intelligently checks their understanding of this topic further by varying the challenge.”
• Significantly builds student knowledge“The testing effect allows students to strengthen their existing schemas in mathematics by testing them on previous topics taught. This prevents them from forgetting, saving valuable lesson time.”