diff --git a/README.md b/README.md
index 4b06b7f..f0eeef1 100644
--- a/README.md
+++ b/README.md
@@ -124,14 +124,14 @@ Example Output:
 ```
 
 ## Initial Values
-Lastly, if you are doing an initiail load of your data from the backend API, you will need to initialize your variables on the CMI object before launching your SCORM 1.2 player:
+Lastly, if you are doing an initial load of your data from the backend API, you will need to initialize your variables on the CMI object before launching your SCORM 1.2 player. After the player has initialized - you will not be able to set any read only values:
 
 <code>
   window.API.cmi.core.student_id = '123';
 </code>
 
 ## Logging
-By default, the API is set to output nothing in the Javascript console, if you want to change this level, you can change it by setting the the apiLogLevel to the appropriate level:
+By default, the API is set to only output errors in the Javascript console, * if you want to change this level * you can change it by setting the the apiLogLevel to the appropriate level:
 
 <code>
   window.API.apiLogLevel = 5 //no logging
diff --git a/src/scormAPI.js b/src/scormAPI.js
index a31bbb2..84a8e6d 100644
--- a/src/scormAPI.js
+++ b/src/scormAPI.js
@@ -1,7 +1,7 @@
 (function() {
-    window.API = new API();
+    window.API = new ScormAPI();
 
-    function API() {
+    function ScormAPI() {
         var _self = this;
 
         var SCORM_TRUE = 'true';
@@ -32,7 +32,7 @@
 
         //Diagnostic functions
 
-        _self.apiLogLevel = LOG_LEVEL_NONE;
+        _self.apiLogLevel = LOG_LEVEL_ERROR;
         _self.apiLog = apiLog;
         _self.on = onListener;
         _self.listenerArray = [];
@@ -526,13 +526,15 @@
 
         return _self;
     }
-
+    
     /**
      * Cmi data model
      *
      * based on the Scorm CMI 1.2 definition at http://scorm.com/scorm-explained/technical-scorm/run-time/run-time-reference/
      */
     function CMI(API) {
+        var STATE_INITIALIZED = 1;
+
         return {
             jsonString: false,
             _suspend_data: '',
@@ -550,7 +552,12 @@
                 return this._launch_data;
             },
             set launch_data(launch_data) {
-                API.throwSCORMError(API, 403);
+                if(API.currentState !== STATE_INITIALIZED) {
+                    this._launch_data = launch_data;
+                }
+                else {
+                    API.throwSCORMError(API, 403);
+                }
             },
             get comments() {
                 return this._comments;
@@ -562,7 +569,12 @@
                 return this._comments_from_lms;
             },
             set comments_from_lms(comments_from_lms) {
-                API.throwSCORMError(API, 403);
+                if(API.currentState !== STATE_INITIALIZED) {
+                    this._comments_from_lms = comments_from_lms;
+                }
+                else {
+                    API.throwSCORMError(API, 403);
+                }
             },
             core: {
                 jsonString: false,
@@ -590,13 +602,25 @@
                     return this._student_id;
                 },
                 set student_id(student_id) {
-                    API.throwSCORMError(API, 403);
+                    debugger;
+
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._student_id = student_id;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get student_name() {
                     return this._student_name;
                 },
                 set student_name(student_name) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._student_name = student_name;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get lesson_location() {
                     return this._lesson_location;
@@ -608,7 +632,12 @@
                     return this._credit;
                 },
                 set credit(credit) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._credit = credit;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get lesson_status() {
                     return this._lesson_status;
@@ -620,19 +649,34 @@
                     return this._entry;
                 },
                 set entry(entry) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._entry = entry;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get total_time() {
                     return this._total_time;
                 },
                 set total_time(total_time) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        API.throwSCORMError(API, 403);
+                    }
+                    else {
+                        this._total_time = total_time;
+                    }
                 },
                 get lesson_mode() {
                     return this._lesson_mode;
                 },
                 set lesson_mode(lesson_mode) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._lesson_mode = lesson_mode;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get exit() {
                     if (!this.jsonString) {
@@ -725,19 +769,34 @@
                     return this._mastery_score;
                 },
                 set mastery_score(mastery_score) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._mastery_score = mastery_score;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get max_time_allowed() {
                     return this._max_time_allowed;
                 },
                 set max_time_allowed(max_time_allowed) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._max_time_allowed = max_time_allowed;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 get time_limit_action() {
                     return this._time_limit_action;
                 },
                 set time_limit_action(time_limit_action) {
-                    API.throwSCORMError(API, 403);
+                    if(API.currentState !== STATE_INITIALIZED) {
+                        this._time_limit_action = time_limit_action;
+                    }
+                    else {
+                        API.throwSCORMError(API, 403);
+                    }
                 },
                 toJSON: jsonFormatter
             },