Product Description: Direct Read of Holt Science & Technology ~ Life Science ~ This Guided Reading Audio CD Program is a set of 22 audio CD's that guide students through the chapters of Holt Science & Technology: Life Science. This unique audio program allows teachers to flexibly target a wide range of reading levels among students.Product Description: Direct Read of Holt Science & Technology ~ Life Science ~ This Guided Reading Audio CD Program is a set of 22 audio CD's that guide students through the chapters of Holt Science & Technology: Life Science. This unique audio program allows teachers to flexibly target a wide range of reading levels among students.