Tier 1 Instruction (or Core Instruction)

Tier 1 is the high-quality core instruction that every student receives. It is the foundation of a Response to Intervention or multi-tiered system, and its purpose is prevention: when core instruction is strong, most students learn to read and spell without needing anything extra. It is characterised by explicit and systematic teaching delivered to the whole class, following a planned scope and sequence. Within the model, well-designed Tier 1 is expected to meet the needs of the large majority of students, a proportion commonly cited as around eighty per cent, leaving a smaller number who need additional support at Tier 2 or Tier 3.

A key implication is that the tiers describe layers of instruction, not labels for children. If a substantial number of students are not succeeding with core instruction, the first response is to strengthen Tier 1 itself, not to move students up the tiers, because no amount of intervention compensates for weak core teaching.

Practical example

Every student in a Year 1 class receives daily structured synthetic phonics lessons, taught explicitly and following the scope and sequence. This shared, high-quality core is Tier 1.

The PLD approach strengthens this core by differentiating within it, rather than treating the whole class as a single level. The lesson moves through three groups, so that every student is exposed to the content pitched for the students working below them and above them, as well as their own. This builds revision of previously covered concepts and pre-teaching of upcoming concepts directly into everyday whole-class teaching. In effect, all students are differentiated inside Tier 1.

Common misconception

Misconception: The tiers describe types of students, so a child is a Tier 1, Tier 2 or Tier 3 learner.

Correction: The tiers describe layers of instruction and support, not categories of children. A student receives Tier 1 and may, for a particular skill and a particular period, also receive Tier 2 or Tier 3. The labels belong to the instruction, and they change as needs change.

Frequently asked questions

Q: What is the aim of Tier 1 instruction?
A: Prevention of failure. Strong core instruction is designed to ensure that most students succeed from the outset, which reduces the number who go on to need intervention.

Q: How is Tier 1 measured?
A: Through universal screening data, which shows what proportion of students are on track, and through fidelity checks, which confirm the core program is being taught as intended. If screening shows many students struggling, that points to the quality of Tier 1 rather than to the students.

Q: What if too many students are not succeeding at Tier 1?
A: That is a signal to review and strengthen the core instruction itself, since intervention cannot substitute for effective whole class teaching.