This is the list from the Education Endowment Foundation website. It is designed to help schools spend their Pupil Premium (extra payment for ‘at risk’ pupils) wisely. EEF measure impact as ‘months impact’, but you can estimate effect-size because 12 months = ES 1.00
Click the ‘Impact’ column on the right to re-order by effect.
When we compare this list with Hattie’s or Marzano’s lists, we do not find significant differences.