Tier 2 reteach for standard 4.NF.4: Apply and extend previous understandings of multiplication to multiply a fraction by a whole number.

Tier 2 reteach for standard 4.NF.3: Understand addition and subtraction of fractions as joining and separating parts referring to the same whole. Focus on like denominators and mixed numbers.

Tier 2 reteach for standard 4.NF.2: Compare two fractions with different numerators and different denominators. Focus on common denominators and benchmark fractions.

Tier 2 reteach for standard 4.NF.1: Explain why fractions are equivalent using visual fraction models. Focus on the "Splitting" and "Merging" strategies.

Tier 2 reteach for standard 4.NBT.6: Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value.

Tier 2 reteach for standard 4.NBT.5: Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value.

A foundational lesson on multi-digit multiplication using color-coded place value strategies and the area model to support students working significantly below grade level.

Tier 2 reteach for standard 4.NBT.4: Fluently add and subtract multi-digit whole numbers using the standard algorithm.

Tier 2 reteach for standard 4.NBT.3: Use place value understanding to round multi-digit whole numbers to any place.