Invite your students to engage in projects such as investigating, writing, drawing, constructing, and composing in these self-guided critical thinking exercises. The units offer a wide variety of topics and skills and can be selected for a particular student or a group of students. Units may be given to individual students or small groups who might benefit from a challenge. Student Self-Check sections follow each unit, supplying correct answers as well as ideas to provoke further thinking. Challenge your students to new levels of logical thinking and doing with this innovative resource.