diff --git a/lib/adagrams.rb b/lib/adagrams.rb
index e69de29..1df5363 100644
--- a/lib/adagrams.rb
+++ b/lib/adagrams.rb
@@ -0,0 +1,96 @@
+require 'csv'
+
+# Added feature for Wave 1 here:
+def draw_letters
+  letter_pool = {
+    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 
+  }
+
+  hand = []
+  letter_pool.each do |letter, quantity|
+    quantity.times do |i|
+      hand << letter.to_s
+    end
+  end
+
+  return hand.sample(10)
+end
+
+
+# Added feature for Wave 2 here:
+def uses_available_letters?(input, letters_in_hand)
+  # edge case
+  return false if input.length > 10 || input.length < 1 
+
+  temp_in_hand = letters_in_hand.clone
+
+  input.upcase!
+  tile_split = input.split("") 
+
+  tile_split.each do |letter|
+    return false if !temp_in_hand.include?(letter)   
+    
+    temp_in_hand.delete_at(temp_in_hand.index(letter))
+  end 
+  return true
+end
+
+
+# Added feature for Wave 3 here:
+def score_word(word) 
+  points = {
+    ["A", "E", "I", "O", "U", "L", "N", "R", "S", "T"] => 1,
+    ["D", "G"] => 2,
+    ["B", "C", "M", "P"] => 3,
+    ["F", "H", "V", "W", "Y"] => 4,
+    ["K"] => 5,
+    ["J", "X"] => 8,
+    ["Q", "Z"] => 10
+  }
+
+  score = 0 
+  score += 8 if (word.length > 6) && (word.length < 11) 
+
+  tile_split = word.upcase.split("")
+
+  tile_split.each do |letter| 
+    points.each do |score_chart, point|
+      score += point if score_chart.include?(letter) 
+    end 
+  end    
+  return score
+end
+
+
+# Added feature for Wave 4 here:
+def highest_score_from(words)
+  contestants = words.map{ |word| [word, score_word(word)] }.to_h
+
+  winning_word = {word: "", score: 0}
+
+  contestants.each do |word, score|
+    if score > winning_word[:score]
+      winning_word = {word: word, score: score}
+    elsif score == winning_word[:score] 
+      if winning_word[:word].length == 10
+        next
+      elsif word.length == 10
+        winning_word = {word: word, score: score}
+      elsif word.length < winning_word[:word].length
+        winning_word = {word: word, score: score}
+      end
+    end  
+  end
+  return winning_word
+end 
+
+
+# Added feature for Wave 5 here:
+def is_in_english_dict?(input)
+  input.downcase! 
+
+  dictionary = CSV.read("assets/dictionary-english.csv")
+  dictionary = dictionary.flatten
+
+  dictionary.include?(input) ? true : false
+end 
diff --git a/test/adagrams_test.rb b/test/adagrams_test.rb
index 90ec44d..bcd72be 100644
--- a/test/adagrams_test.rb
+++ b/test/adagrams_test.rb
@@ -179,3 +179,18 @@
     end
   end
 end
+
+describe 'is_in_english_dict? method' do
+
+  it 'if word in dictionary' do
+    word = 'test'
+
+    expect(is_in_english_dict?(word)).must_equal true
+  end
+
+  it 'if word not in dictionary' do
+    word = 'swir'
+
+    expect(is_in_english_dict?(word)).must_equal false
+  end
+end 
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