Home › Authors › Ed Southall 👤 Ed Southall 5 books Books by Ed Southall If I Could Tell You One Thing If I Could Tell You One Thing 2022 Yes, but Why? Teaching for Und Yes, but Why? Teaching for Understanding in Mathematics 2021 Geometry Snacks, Ages 8-18 2018 Yes, but why? Yes, but why? 2017 More Geometry Snacks More Geometry Snacks 2011