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Welcome to
Addimals & Subtractimals

Addimals and Subtractimals teach single-digit addition and subtraction for grades K-2.

Teachley's K-2 apps were produced by teachers and researchers, award winning game designers and noted voice talent.

App Screen Shots

Awards and Accolades

Not All Education Apps
Are Created Equal

We don’t rely on digital flashcards and worksheets.

Teachley's characters show kids how to master different addition and subtraction strategies, like counting on, counting back, and using doubles facts.

Visual Models To Aid Learning

Children who struggle fail to learn key math strategies. That’s why we help students visualize these strategies using models, like the ones shown here:

For Us, Games Are
a Serious Subject

As former teachers and experts in cognition and learning we're dedicated to using research to better understand how kids learn .

Research shows strategies drive learning. By promoting conceptual understanding and fact fluency kids don't just solve problems, they come away with new tools for learning math.

TYPICAL DEVELOPMENT — SOLVING 3 + 4 TYPICAL DEVELOPMENT — SOLVING 3 + 4 POOR MATH PERFORMERS POOR MATH PERFORMERS

Aligned with Common Core and other state standards

We address many K-2 Operations and Algebraic Thinking Common Core Standards and other state standards, including:

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)...and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Supported by Research

In a recent pilot study, after just three 6-minute sessions playing Addimal Adventure 1st - 3rd graders used more advanced strategies at posttest.

Download Addimals and Subtractimals today on the App Store.