Heather L found Quizalize:

• Moderately improves attainment
• Moderately improves teaching efficiency and productivity“Pre-made activities and automated differentiation help speed things up during lesson planning and the lesson itself. It's easy to see which of my students are struggling, which helps me make quicker and more informed decisions for providing remediation.”
• Moderately reduces teacher workload“Less time and effort spent grading and gathering results data.”