Below are the scripts that can be discussed and run with a class
ruby 1_hello_world.rb
ruby 2_count_words.rb
ruby 3_replace_all_words.rb
ruby 4_replace_one_word.rb
ruby 5_count_to_10.rb
ruby 6_count_and_replace.rb
ruby 7_functions.rb
ruby 8_sentence.rb
ruby 9_logic.rb
Tested on ruby 2.3