Adventures with the Number 17

17 is “seventeen”. It represents a quantity of seventeen things when we count.

You spell 17 as “seventeen”.

The number before 17 is 16, and the number after is 18.

The number seventeen is a unique and prime number! It's made up of a '1' (representing one full group of ten) and a '7' (representing seven single units). When you see '17', you can think of it as 'one ten and seven more'. What makes seventeen extra special is that it's a 'prime' number. This means it can't be divided into any smaller equal groups (other than one group of seventeen). It’s a true individual! Understanding 'seventeen' helps children become more confident with the higher 'teen' numbers and the patterns within our number system.

It’s pronounced [ˌsɛvənˈtiːn]. You can also clap the syllables as you say “seventeen” to make it stick.

Seventeen dots require two ten-frames: one completely full frame, and a second frame with seven dots. This is a clear picture of '10 + 7'.

Start at 0 and count forward to 17. You can also jump by 2s or 5s to build flexible counting.

17 is odd, so one will be left over when splitting into two equal groups.

Look for 17 on calendars, house numbers, page numbers, sports scores, and signs. Spotting it “in the wild” makes it easier to remember.

This is a wonderful fine motor and counting activity. You'll need some string and seventeen beads. The task is to create a beautiful necklace or bracelet using exactly seventeen beads. This simple activity requires your child to carefully count out a larger quantity of objects and then use their fine motor skills to thread them onto the string. You can also incorporate patterns, for example: 'Let's make a pattern with two red beads, then two blue beads, until we get to seventeen!'. The finished product is a lovely piece of jewelry they can feel proud of making themselves.

This is a fantastic collaborative storytelling game that practices counting and sequencing. The goal is to create a story together that has exactly seventeen sentences. You start with the first sentence: 'Once upon a time, there was a brave knight...'. Then your child adds the second sentence: '...who lived in a tall castle.' You go back and forth, counting each sentence until you reach seventeen. The final sentence is the grand conclusion to your epic tale! This game is great for creativity, communication, and practicing counting with a larger number in a meaningful, fun context.

This is a great hands-on activity for understanding the concept of prime numbers. You'll need seventeen small objects, like pebbles or blocks. First, count them all to confirm you have seventeen. Then, challenge your child to see if they can divide the seventeen objects into smaller, equal groups. Can you make two equal piles? No. Can you make three equal piles? No. This simple experiment shows them that seventeen is a 'prime' number because it can't be split up. It’s a powerful, concrete way to introduce a key mathematical concept.

A few minutes a few times a week is perfect. Consistency matters more than long sessions, so keep it playful and connected.