The word “schedule” can be pronounced in two main ways, and the pronunciation may vary between British and American English:
British English: In British English, it is commonly pronounced as /ˈʃɛdjuːl/ (shed-yool). The “ch” in “schedule” is pronounced like “sh.”
American English: In American English, it is often pronounced as /ˈskɛdʒuːl/ (sked-jool). The “ch” in “schedule” is pronounced like “k.”
Both pronunciations are widely accepted, so you can choose the one that is more commonly used in your region or the one you prefer.