diff --git a/chromebook-checkout-meteor/collections/carts.js b/chromebook-checkout-meteor/collections/carts.js
index 90f3004..8e3892b 100644
--- a/chromebook-checkout-meteor/collections/carts.js
+++ b/chromebook-checkout-meteor/collections/carts.js
@@ -4,7 +4,7 @@ carts.allow({
     return Roles.userIsInRole(userId, ['admin']);
   },
   update: function (userId, doc) {
-    return (userId != null);
+    return Roles.userIsInRole(userId, ['admin', 'teacher'];
   },
   remove: function (userId, doc) {
     return Roles.userIsInRole(userId, ['admin']);
diff --git a/chromebook-checkout-meteor/collections/chromebooks.js b/chromebook-checkout-meteor/collections/chromebooks.js
index 759cc02..21a0a2d 100644
--- a/chromebook-checkout-meteor/collections/chromebooks.js
+++ b/chromebook-checkout-meteor/collections/chromebooks.js
@@ -4,7 +4,13 @@ Chromebooks.allow({
     return Roles.userIsInRole(userId, ['admin']);
   },
   update: function (userId, doc) {
-    return (userId != null);
+  	if ((Chromebooks.findOne({userid: Meteor.userId()}) === undefined) 
+    || (Roles.userIsInRole(Meteor.userId(), ['admin', 'teacher']))) {
+      Chromebooks.update(this._id, {$set: {status: 1}});
+      Chromebooks.update(this._id, {$set: {last_checkout: new Date()}});
+      Chromebooks.update(this._id, {$set: {userid: Meteor.userId()}});
+      Chromebooks.update(this._id, {$set: {user: Meteor.user().profile.name}});
+    }
   },
   remove: function (userId, doc) {
     return Roles.userIsInRole(userId, ['admin']);