Increasing the performance of secondary students with learning disabilities (LD) in mathematics on word problem-solving tasks involving ratios and proportions is challenging for secondary math teachers. Teachers must use evidence-based practices to enhance secondary students’ problem-solving proficiency and math achievement. Schema-based instruction (SBI) is a powerful evidence-based practice to improve students’ understanding and approach to solving word problems involving ratios and proportions. This article describes the protocol for implementing SBI with examples specific to ratios and proportions. Also discussed are the ways teachers can provide additional assistance to students with more intensive instructional needs when implementing SBI.