Longhorn Secondary Biology Series is a new course developed in line with the new curriculum implemented from 2003. It fulfills all the goals and targets of the secondary Biology syllabus. It is approved by the Ministry of Education to be used in secondary schools in Kenya.Longhorn Secondary Biology Series makes learning Biology easier and enjoyable by:

• presenting Biology as a practical oriented subject which helps the learner in being initiative in the learning process. 
• presenting the contents in well and logically organised topics which facilitate sequential transition from one concept to the next. 
•  providing activities and exercises which allow performance evaluation in each topic. 
•  having a user-friendly approach which is well-centered on the learner's own environment for easier understanding.
• integration of text and illustrations which aid and demonstrate concepts for easier understanding. 
•  taking care of learners with special needs.