## Operations & Algebraic Thinking

While ten frames should start in Kindergarten, ten and twenty frames are great for developing mental math skills in all elementary grades.

Dreambox - Simple Ten Frame game, but be ready, it goes fast! Using a two by five array, the Ten Frame supports the use of five as an anchor for early number sense.  Lesson

Dreambox -  Bead/Rack number line game. Using one, two, or ten wires.  Supports the use of fives, tens, and doubles as anchors for supporting automaticity.  Lesson

Dreambox - Just like the ten frames but practice for 1.OA.C.6

Dreambox - Just like the ten beads/racks but practice for 1.OA.C.6

Illuminations - Basic Ten Frame Game

Fuel the Brain - A different variation of ten frames for higher levels

# 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 - 0 CCSS.MATH.CONTENT.K.OA.A.1
Represent addition and subtraction with objects, fingers, mental images, drawings1, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
CCSS.MATH.CONTENT.K.OA.A.2
Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

CCSS.MATH.CONTENT.K.OA.A.4
For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawing or equation.

CCSS.MATH.CONTENT.1.OA.C.6
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).