--- a/backbone.shard.js	Thu Mar 21 15:30:18 2013 +0900
+++ b/backbone.shard.js	Thu Mar 21 15:47:33 2013 +0900
@@ -1,7 +1,7 @@
 /*
  *      backbone.shard.js.
  * 
- *      (c) 2012 Anton Shestakov.
+ *      (c) 2013 Anton Shestakov.
  * 
  *      This extension to Backbone may be freely distributed
  *      under the MIT license:
@@ -57,20 +57,16 @@
     
     pluck: function(attr) {
         return _.map(this.models, function(model) { return model.get(attr); });
-    },
-    
-    chain: function () {
-      return _(this.models).chain();
     }
 });
 
 // Underscore methods that we want to implement on the Shard.
 var methods = ['forEach', 'each', 'map', 'collect', 'reduce', 'foldl',
     'inject', 'reduceRight', 'foldr', 'find', 'detect', 'filter', 'select',
-    'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke'
-    , 'max', 'min', 'sortedIndex', 'toArray', 'size', 'first', 'head',
-    'take', 'initial', 'rest', 'tail', 'last', 'without', 'indexOf',
-    'shuffle', 'lastIndexOf', 'isEmpty'];
+    'reject', 'every', 'all', 'some', 'any', 'include', 'contains', 'invoke',
+    'max', 'min', 'toArray', 'size', 'first', 'head', 'take', 'initial', 'rest',
+    'tail', 'drop', 'last', 'without', 'indexOf', 'shuffle', 'lastIndexOf',
+    'isEmpty', 'chain'];
 
 // Mix in each Underscore method as a proxy to `Shard#models`.
 _.each(methods, function(method) {

--- a/demo.html	Thu Mar 21 15:30:18 2013 +0900
+++ b/demo.html	Thu Mar 21 15:47:33 2013 +0900
@@ -6,7 +6,7 @@
     
     <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
     <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.4/underscore-min.js"></script>
-    <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js"></script>
+    <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js"></script>
     
     <script src="backbone.shard.js"></script>
   </head>

--- a/test/index.html	Thu Mar 21 15:30:18 2013 +0900
+++ b/test/index.html	Thu Mar 21 15:47:33 2013 +0900
@@ -6,7 +6,7 @@
     <script src="http://code.jquery.com/qunit/qunit-1.10.0.js"></script>
     
     <script src="http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.4.4/underscore-min.js"></script>
-    <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.2/backbone-min.js"></script>
+    <script src="http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.0.0/backbone-min.js"></script>
     
     <script src="../backbone.shard.js"></script>
     <script src="basic-filters.js"></script>

--- a/test/underscore-methods.js	Thu Mar 21 15:30:18 2013 +0900
+++ b/test/underscore-methods.js	Thu Mar 21 15:47:33 2013 +0900
@@ -14,8 +14,6 @@
     }
 });
 
-// TODO: test sortedIndex
-
 test('Underscore methods: basics', function() {
     strictEqual(shard.first(), a, 'first() works');
     strictEqual(shard.last(), c, 'last() works');
@@ -98,9 +96,10 @@
     }, ''), 'cba', 'reduceRight() works');
 });
 
-test('Underscore methods: method aliases (working in Backbone.Collection since 0.9.9)', function() {
+test('Underscore methods: method aliases', function() {
     strictEqual(shard.head(), a, 'head() works');
     deepEqual(shard.tail(), [b, c], 'tail() works');
+    deepEqual(shard.drop(), [b, c], 'drop() works');
     deepEqual(shard.countBy('data'), {a: 1, b: 1, c: 1}, 'countBy() works');
     
     deepEqual(shard.select(function(model) {