Noa, for anyone teaching Legal English, the book "Plain English for Lawyers" by Richard Wydick is a must. It's from Carolina Academic Press and is now in its fourth or fifth edition. It's a small book and has many exercises with answers (great for in-class group work), and has additional exercises that can be taken home and turned in for teacher evaluation as the answers are in the Teacher's Manual. I've used it with great success for years with US law students and international LE students.
Mark