FOSS Pathways Science Resources Book features original readings developed to accompany each FOSS Pathways module. The readings are referred to as articles in the Investigations Guide (sold separately). Students will read the articles in the book as they progress through the module; these articles cover a specific concept usually after that concept has been introduced in an active investigation. Together, the articles in FOSS Science Resources and the discussion questions provided in the Investigations Guide help students make connections to the science concepts introduced and explored during the active investigations. FOSS Science Resources Books are sold as softcover for Grades K to 2 (8 x 10 inch) and as hardcover for Grades 3 to 5 (8-5/8 x 11-1/4 inches).