diff --git a/lib/adagrams.rb b/lib/adagrams.rb
index e69de29..12947c3 100644
--- a/lib/adagrams.rb
+++ b/lib/adagrams.rb
@@ -0,0 +1,135 @@
+# Wave 1 method: drawing 10 letters into hand
+def draw_letters 
+    letter_quantities = {
+        "A" => 9,
+        "B" => 2,
+        "C" => 2,
+        "D" => 4,
+        "E" => 12,
+        "F" => 2,
+        "G" => 3,
+        "H" => 2,
+        "I" => 9,
+        "J" => 1,
+        "K" => 1,
+        "L" => 4,
+        "M" => 2,
+        "N" => 6,
+        "O" => 8,
+        "P" => 2,
+        "Q" => 1,
+        "R" => 6,
+        "S" => 4,
+        "T" => 6,
+        "U" => 4,
+        "V" => 2,
+        "W" => 2,
+        "X" => 1,
+        "Y" => 2,
+        "Z" => 1
+    }
+
+    letter_pool = []
+    letter_quantities.each do |letter, num|
+        num.times do
+            letter_pool << letter
+        end
+    end
+
+    return letter_pool.shuffle[0..9]
+end
+
+# Wave 2: Checks that input uses letters that are in hand
+def uses_available_letters?(input, letters_in_hand)
+    input_array = input.upcase.split(//)
+    input_array.each do |letter|
+        if input_array.count(letter) > letters_in_hand.count(letter) 
+            return false
+        end
+    end
+    return true
+end
+
+# Wave 3: return a score for input word
+def score_word(word)
+    letter_values = {
+        "A" => 1,
+        "B" => 3,
+        "C" => 3,
+        "D" => 2,
+        "E" => 1,
+        "F" => 4,
+        "G" => 2,
+        "H" => 4,
+        "I" => 1,
+        "J" => 8,
+        "K" => 5,
+        "L" => 1,
+        "M" => 3,
+        "N" => 1,
+        "O" => 1,
+        "P" => 3,
+        "Q" => 10,
+        "R" => 1,
+        "S" => 1,
+        "T" => 1,
+        "U" => 1,
+        "V" => 4,
+        "W" => 4,
+        "X" => 8,
+        "Y" => 4,
+        "Z" => 10
+    }
+    total_score = 0
+    word.upcase.split(//).each do |letter|
+        total_score += letter_values[letter]
+    end
+
+    if word.length > 6
+        total_score += 8
+    end
+
+    return total_score    
+end
+
+# Wave 4: Outputs winning word and score
+def highest_score_from(words)
+    highest_score = 0
+    winning_words = []
+    words.each do |word|
+        if score_word(word) > highest_score
+            highest_score = score_word(word)
+            winning_words.clear << word
+        elsif score_word(word) == highest_score
+            winning_words << word
+        end
+    end
+
+    # no tie scenario
+    if winning_words.count == 1
+        return {word: winning_words[0], score: highest_score}
+    else 
+
+        # tie scenario
+        winning_words.each do |word|
+            # determines whether word is 10 letters long
+            if word.length == 10
+                return {word: word, score: highest_score}
+            end
+        end
+        # if there is no 10 letter word, find shortest word
+        winner = winning_words.min_by do |word|
+            word.length
+        end 
+
+        return {word: winner, score: highest_score}
+    end    
+end
+
+# Wave 5: check if input is an english word
+def is_in_english_dict?(input)
+    file = File.open("assets/dictionary-english.csv", "r")
+    dictionary = file.collect(&:chomp)
+    file.close
+    return dictionary.include?(input.downcase)
+end
\ No newline at end of file
diff --git a/test/adagrams_test.rb b/test/adagrams_test.rb
index 90ec44d..bb2bd3e 100644
--- a/test/adagrams_test.rb
+++ b/test/adagrams_test.rb
@@ -178,4 +178,14 @@
       expect(best_word[:score]).must_equal 18
     end
   end
+  describe 'is_in_english_dict? method' do
+    it 'returns true if the input is an english word' do
+      result = is_in_english_dict?("cat")
+      expect(result).must_equal true
+    end
+    it 'returns false if the input is not an english word' do
+      result = is_in_english_dict?("ghxz")
+      expect(result).must_equal false
+    end
+  end
 end