diff --git a/apps/dashboard/src/lib/features/course/utils/progression-utils.ts b/apps/dashboard/src/lib/features/course/utils/progression-utils.ts
index b7331e28..7fb6e98f 100644
--- a/apps/dashboard/src/lib/features/course/utils/progression-utils.ts
+++ b/apps/dashboard/src/lib/features/course/utils/progression-utils.ts
@@ -43,7 +43,7 @@ function computeProgressionAccess(
   let priorBlockingComplete = true;
 
   for (const item of navigableItems) {
-    const teacherLocked = !(item.isUnlocked ?? false);
+    const teacherLocked = !(item.isUnlocked ?? true);
     const progressionLocked = progressionMode === 'sequential' && !priorBlockingComplete;
 
     let accessible = !teacherLocked && !progressionLocked;
diff --git a/packages/core/src/services/course/progression.ts b/packages/core/src/services/course/progression.ts
index 442fd323..8bd5d4c7 100644
--- a/packages/core/src/services/course/progression.ts
+++ b/packages/core/src/services/course/progression.ts
@@ -105,7 +105,7 @@ function annotateNavigableAccess(params: {
   for (const item of params.navigableItems) {
     const lessonPolicy = params.lessonPolicyById.get(item.id);
     const exercisePolicy = params.exercisePolicyById.get(item.id);
-    const teacherLocked = !(item.isUnlocked ?? false);
+    const teacherLocked = !(item.isUnlocked ?? true);
     const progressionLocked = params.progressionMode === 'sequential' && !priorBlockingComplete;
 
     let accessible = !teacherLocked && !progressionLocked;