[iSTEEP MTSS: Assessment - Diagnostics - Intervention - Progress Monitoring - iSTEEP MTSS steep is a comprehensive mtss (multi-tiered system of supports) platform that integrates a robust suite of tools for screening, targeted intervention, and extensive progress monitoring. fully aligned with all five pillars of the science of reading, isteep brings together all facets of mtss in one simple, cost-effective system.]