Looking for a missing addends intervention that actually works for 1st grade?This first grade missing addends math intervention is designed for small groups, RTI, and math intervention time when students struggle with addition and subtraction concepts, not just fact fluency.

You pull a small group for a missing addends intervention. You model the problem, give practice, and hope it clicks—but students still guess, add both numbers together, or start counting from 1 every time. For many students, missing addends aren’t a fact fluency issue. They’re a conceptual understanding issue. Without understanding what the equal sign means, how parts and totals relate, or how to count on efficiently, practice alone won’t lead to growth. This Missing Addends Intervention is designed to reteach the skill intentionally using explicit instruction, aligned assessments, and a clear plan.

The intervention follows a Concrete–Representational–Abstract (CRA) progression so students build understanding before being expected to solve missing addends mentally.

This intervention includes:

• Quick Start guide with step-by-step implementation
• Skill map showing how missing addend skills progress
• Decision rules to determine where to begin instruction
• Nine Pages of Word-for-word teaching scripts (Concrete, Representational, Abstract)
• Guided practice pages aligned to each script
• Twelve baseline/weekly progress monitoring assessments
• Common misconceptions with error-correction guidance
• Entry and exit criteria to support RTI/MTSS documentation
  

Perfect for:

• Tier 2 and Tier 3 math interventions
• Small groups or one-on-one instruction
• RTI/MTSS progress monitoring
• Intervention blocks and support services

What’s Included

• Quick Start Guide for easy implementation
• Skill Map showing how missing addend skills progress
• Decision Rules to determine where to start and when to move on
• Concrete, Representational, and Abstract teaching scripts
• Guided practice pages aligned to each script
• Baseline and weekly progress monitoring assessments
• Data recording sheets to track accuracy and level of support
• Common misconceptions and error-correction guidance
• Entry and exit criteria for intervention fidelity
  

Why Teachers Love This Resource

⭐ Removes the guesswork from intervention
⭐ Saves planning time
⭐ Provides clear, repeatable routines
⭐ Makes progress monitoring meaningful
⭐ Helps students stop guessing and start understanding
⭐ Easy to use for teachers, interventionists, tutors, or paraprofessionals

Check out more missing addend practice HERE.