This document discusses formative assessments for 21st century skills. It begins by defining 21st century skills such as critical thinking, collaboration, self-direction, and technology literacy. It then explains that formative assessments should inform instruction by showing what students have learned and still need to learn. Effective formative assessments provide clear learning targets and feedback to students. Examples of formative assessments that can evaluate 21st century skills include rubrics, checklists, digital portfolios, and student self-assessments. Workshops are provided for teachers to design assessments by starting with learning objectives and determining how student mastery will be measured.