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