diff --git a/lib/adagrams.rb b/lib/adagrams.rb
index e69de29..b638951 100644
--- a/lib/adagrams.rb
+++ b/lib/adagrams.rb
@@ -0,0 +1,127 @@
+require 'csv'
+
+## WAVE 1 - build a hand of 10 random letters from a pool ##
+def draw_letters
+	letters = {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}
+
+	pool_of_letters = []
+	
+	letters.each do |letter, amount|
+		amount.times do
+			pool_of_letters << letter.to_s
+		end
+	end
+
+	hand = []
+
+	10.times do 
+		letter = pool_of_letters.sample
+		pool_of_letters.slice!(pool_of_letters.index(letter))
+		hand << letter
+	end
+	
+	hand.each do |letter|
+		pool_of_letters << letter
+	end
+
+	return hand.sort
+end
+
+## WAVE 2 - check if an input word only uses words contained within the hand ##
+def uses_available_letters?(input, letters_in_hand)
+	lih_clone = letters_in_hand.dup
+	word = input.upcase.split('')
+ 
+	letters_match = word.map do |letter|
+		break if lih_clone.index(letter) == nil
+		lih_clone.slice!(lih_clone.index(letter))
+		letter
+	end
+
+	if word == letters_match
+		word.each do |letter|
+			lih_clone << letter
+		end		
+		return true
+	else
+		return false
+	end
+end
+
+## WAVE 3 - returns the score of a given word ##
+def score_word(word)
+	score_chart = {
+		1 => ["A", "E", "I", "O", "U", "L", "N", "R", "S", "T"],
+		2 => ["D", "G"], 
+		3 => ["B", "C", "M", "P"],
+		4 => ["F", "H", "V", "W", "Y"],
+		5 => ["K"],
+		8 => ["J", "X"],
+		10 => ["Q", "Z"]
+	}
+
+	word = word.split('')
+	
+	score = 0
+	word.each do |letter|
+		score_chart.each do |value, array|
+			score += value.to_i if array.include?(letter.upcase)
+		end
+	end
+
+	score += 8 if word.length > 6 && word.length < 11
+	
+	return score
+end
+
+## WAVE 4 - find the highest scoring word ##
+def highest_score_from(words)
+	words_with_scores = words.map do |word|
+		{:word => word, :score => score_word(word)}
+	end 
+
+	highest_score = words_with_scores.max_by do |index|
+		index[:score]
+	end
+
+	tied_scores = []
+	words_with_scores.each do |word|
+		tied_scores << word if word[:score] == highest_score[:score]
+	end
+
+	return tied_scores[0] if tied_scores.length == 1
+
+	shortest_length = tied_scores.min_by do |index|
+		index[:word].length
+	end
+
+	tied_scores.sort_by! do |tied|
+		-tied[:word].length
+	end
+
+	tied_scores.each do |tied|
+		case tied[:word].length
+			when 10
+				return tied
+			when shortest_length[:word].length
+				return tied
+			else
+				next
+		end
+	end
+end
+
+## WAVE 5 - verify that the input word is valid against the english dictionary ##
+def is_in_english_dict?(input)	
+	input = input.downcase
+
+	dictionary = CSV.read('assets/dictionary-english.csv', headers: true).map do |word|
+		word[0]
+	end
+
+	dictionary_grouped = dictionary.group_by do |word|
+		word[0]
+	end
+
+	return dictionary_grouped[input[0]].include?(input)
+end
\ No newline at end of file
diff --git a/test/adagrams_test.rb b/test/adagrams_test.rb
index 90ec44d..561110b 100644
--- a/test/adagrams_test.rb
+++ b/test/adagrams_test.rb
@@ -178,4 +178,29 @@
       expect(best_word[:score]).must_equal 18
     end
   end
+
+  describe "is_in_english_dict method" do
+    it 'if word appears in the dictionary' do
+      word = "banana"
+      is_in_dictionary = is_in_english_dict?(word)
+      expect(is_in_dictionary).must_equal true
+    end
+
+    it 'if word does not appear in the dictionary' do
+      word = "gaenih"
+      is_in_dictionary = is_in_english_dict?(word)
+      expect(is_in_dictionary).must_equal false
+    end
+
+    it 'check if word is downcase' do
+      word = "BANANA"
+      weird_word = "bAnANas"
+
+      is_in_dictionary = is_in_english_dict?(word)
+      expect(is_in_dictionary).must_equal true
+
+      is_in_dictionary = is_in_english_dict?(weird_word)
+      expect(is_in_dictionary).must_equal true
+    end
+  end
 end