Okay, I can set up the basic structure for your "Gregor-E Library" Android application using Kotlin. This will include the main activity, layout files, and placeholders for the navigation structure you described. Note: This structure provides the layout and basic navigation setup. Implementing the full navigation logic (passing data between screens like grade, quarter, subject) and the "Open PowerPoint" functionality requires more detailed Android development, including handling file access permissions and intents, which goes beyond this initial setup.

]]> Gregor-E Library Gregor-E Library Grade 11 Gregor-E Library Grade 12 About Us 1st Quarter 2nd Quarter 3rd Quarter 4th Quarter Close Open PowerPoint We are a team dedicated to providing easy access to educational resources. Our platform is designed to help students manage study materials anytime, anywhere. Oral Comm Komunikasyon General Mathematics Earth Science Understanding Culture Society and Politics Personal Development Physical Education Reading and Writing Pagbasa 21st Century Literature Stats and Probability Physical Education Oral Comm Komunikasyon General Mathematics Earth Science Understanding Culture Society and Politics Personal Development Physical Education Reading and Writing Pagbasa 21st Century Literature Stats and Probability Physical Education Week 1 Week 2 Week 3 Week 4 Week 5 Week 6 Week 7 Week 8 ]]>