The ICF Core Competencies are straightforward and doable, but they require a lifetime of focused practice to master. The Supplemental Workbook is a great tool for those of you seeking to work at a deeper level and capture your journey in writing. With its self-assessments, exercises, and growth challenges, this workbook is especially helpful for people in coach training programs. As you work through the exercises, you'll build your confidence about test taking, and you'll create a customized reference book you'll use again and again in your own coaching.