This lesson reviews 1st Grade math concepts of addition, subtraction, telling time to the hour, and making 10. It is designed as a "Choose Your Own Adventure" form that links students to hyperdocs for each topic.Image Attribution

This problem with multiple solutions offers an opportunity for students to practice simple addition and subtraction, work with number sentences (equations), and develop systematic work habits. Given cards containing the addition, subtraction and equal signs along with the digits 2, 4, 6, and 8. solvers are challenged to find as many ways as possible to arrange some or all seven cards to create true statements. The Teachers' Notes page offers suggestions for implementation, discussion questions, ideas for extension and support, printable cards (pdf) and a link to an interactive Flash applet.

This three-act math task utilizes videos and questioning to help students explore addition and subtraction within 20.

Students solve 3 digital math addition fact puzzles in order to escape the jungle (1-find their way through the cave, 2-sneak past the sleeping lions to get to the jeep, and 3-opening the treasure chest for the key to the jeep!)
Addition to 20

Thumbnail Image Citation: Bouwhuis, Laura. "Escape the Jungle" Google Sites, 12 July 2022, https://sites.google.com/alpinedistrict.org/escapethejungle/home

This card game reinforces counting forward and backward within 20. It can be played by 2-6 players with six sets of cards numbered 1 to 20 (printable download included). The object of the game is to build up six stacks in the middle of the table, face up, in order from 1 at the bottom to 20 on the top. Each player in turn plays cards, according to specified rules, onto opponents' face-up piles or onto a center stack until no more plays are possible. The first player to get rid of all his/her cards is the winner. The game could also be played with ordinary playing cards.

In this class activity, students find the missing number to complete a number sentence while also seeing different representations made by other students.