Lynn English found Sumdog Maths and Spelling:

• Significantly reduces teacher workload“Competitions and challenges give learners the opportunity to practise skills in a fun way. These are also very easy to set up. Assessments are easy to set up and give invaluable feedback.”
• Significantly improves teaching efficiency“Resources are at hand and are easy to access.”
• Significantly improves attainment“Learners want to do their best and try hard to improve their scores. The challenges give practise and the assessments show where difficulties lie.”
• Significantly builds student knowledge“Outcomes are broken down into specific skills which can then be concentrated on.”