Mental Math Games: Number Sense Subitizing Flash Cards 5 Ways!

This unique set of 40 subitizing flashcards encourages your students to practice a vital mental math skill: subitizing, which is instantly recognizing how many there are in small groups of items and then using that knowledge for counting larger numbers!

It’s a fun way to also practice early multiplication skills and learn math facts- by mentally counting equal groups in a visual display. Finally, it's an easy and simple routine to foster students' number sense. It makes a great math centre to use all year long in multiple ways!

There are two unique cards for each number value from 1-20: 40 cards in all!

Ways to Use:

1) Traditional Flashcards: Hold up a flashcard and ask your student to let you know how many items there are using their mental counting skills.

2) Memory Game: Spread mixed-up pairs of cards facedown on the table (you could use from 5-20 pairs, based on your students’ ages and abilities). Students will take turns, flip two cards over, and look for pairs of cards that have the same value. They continue playing as you would a standard memory matching game.

3) Line Them Up: Have your students work individually or in pairs to line up one set of cards with values from 1-20.

4) One More, One Less: One student shows a single card. Their partner can search through the rest of the cards to find one that is worth one more and a card that is worth one less.

5) Explain Your Counting: Have your students use the included worksheet to explain how they mentally count the items on one of the cards. For example, "I see 4 groups of 4 and one more."

What's Included: 12 Page PDF- Ready to Print and Use!

• Teacher Instructions (for five different games and activities)

• Student Worksheet for "Explain Your Counting"

• 10 Pages of Flashcards