In Hattie’s 2017 Visible Leaning Summary (linked below),
“providing formative evaluation” had a 0.48 effect size and “feedback” had a
0.70 effect size. Formative assessment
with feedback is a powerful tool in the mathematics classroom and in this session we will investigate these topics.
https://visible-learning.org/wp-content/uploads/2018/03/VLPLUS-252-Influences-Hattie-ranking-DEC-2017.pdf