diff --git a/materials/part1_intro.pptx b/materials/part1_intro.pptx
index 164c93d..30691d5 100644
Binary files a/materials/part1_intro.pptx and b/materials/part1_intro.pptx differ
diff --git a/materials/part3_editable_install.pptx b/materials/part3_packages_editable_install.pptx
similarity index 94%
rename from materials/part3_editable_install.pptx
rename to materials/part3_packages_editable_install.pptx
index 41624b0..17d1fb9 100644
Binary files a/materials/part3_editable_install.pptx and b/materials/part3_packages_editable_install.pptx differ
diff --git a/materials/part4_package_structure.pptx b/materials/part4_repo_structure.pptx
similarity index 98%
rename from materials/part4_package_structure.pptx
rename to materials/part4_repo_structure.pptx
index 2bc8d9f..79eb3fa 100644
Binary files a/materials/part4_package_structure.pptx and b/materials/part4_repo_structure.pptx differ
diff --git a/materials/part6_documentation_formatting.pptx b/materials/part6_accessibility.pptx
similarity index 100%
rename from materials/part6_documentation_formatting.pptx
rename to materials/part6_accessibility.pptx