Not only letters and numbers, things that we are required to introduce to our kids are the names of days of the week. The device that can help us to teach them names of days is days of the week chart. We can simply download the week chart here.
Actually, when it comes to teaching kids with the names of the days of the week, we are also required to teach them the sequence of the days in a week. Yes, this is helpful for them to know the concept of saying the right names of days when we say "the day after", "yesterday", "two days later", and many more.
When it comes to the last day, the 7th day of the week, actually, there are some people who say Sunday or Monday. Well, this is fine, since a certain country adapts to a different standard. If we know the last day or the 7th day of the week is Sunday, we actually use the international standard that is ISO 8601.
However, some countries, including The United States of America and Canada use different standards where they can end the day of the week on Monday.
Besides introducing kids with names of days of the week by using days of the week chart, we can also tell them about the history too. Yes, we are here talking about the origin term that can make the name of the days until we can call them "Sunday" to "Monday".
Speaking of the history of the names of the days, originally, the days got their names from the planets of Hellenistic astrology. When we start our day with Sunday, this actually matches the order of the Hellenistic astrology. The names of the planets of the Hellenistic astrology are: Sun, Moon, Mars (Ares), Mercury (Hermes), Jupiter (Zeus), Venus (Aphrodite), and Saturn (Cronos).
Well, when we use days of the week chart for our kids to teach them the concept of days, we can prepare to be asked by our kids, such as "Why are the days of the week started by Sunday?" To answer the question that probably will be asked by our kids, we can elaborate them by telling them the historical reason.
Well, using the historical perspective, we use Sunday as the first day of the week because the ancient Egyptian use the analogy of "Day of the sun" to set the beginning of the day. The day of the sun was originally the day of honor of the sun-god.