Using Assessment Data to Plan Elementary Instruction

A stack of results is not information. It becomes information when it produces a decision.

There are only three decisions.

The Three Decisions

1. Reteach the whole class. More than about half missed it. This isn't twenty-four individual gaps, it's one thing you taught that didn't land. Reteach differently tomorrow, not louder.

2. Pull a small group. A handful missed it. Fifteen minutes with five children while everyone else does something independent.

3. Move on. Nearly everyone got it. Stop analysing and teach the next thing. This decision is underused, and over-analysing a result everyone passed is a real way to lose an evening.

Every set of results resolves to one of those. If you can't decide which, the check probably wasn't specific enough.

The Rough Thresholds

Not rules, but useful defaults for a class of about twenty-four:

• 13+ missed it: whole-class reteach
• 4 to 12 missed it: small group
• 3 or fewer: individual check-in, or it was a careless slip

The middle band is where most decisions live, and it's where a per-question breakdown earns its keep.

Read the Wrong Answers

This is the part that turns data into teaching.

A score says nine children got it wrong. The wrong answers say why.

If seven of those nine chose the same wrong option, that option names the misconception. In elementary maths this is usually specific and diagnosable:

• Answered 61 instead of 51: added without regrouping
• Answered 511: didn't align place value
• Answered 1/2 is smaller than 1/3: applying whole-number logic to denominators
• Answered with the numbers in the wrong order: read the word problem left to right without modelling it

Those four need four different lessons. The score alone would have produced one generic reteach.

This is why a per-question breakdown matters more than any other tool feature.

Three Groups Is the Ceiling

The temptation after a good assessment is to make five precisely-targeted groups.

Don't. In a self-contained elementary classroom, more groups means less time with each one. Four groups of six usually produces worse outcomes than three groups of eight, because you're spread too thin to teach any of them properly.

Three groups: needs reteaching, needs practice, ready to extend. That's usually enough resolution to act on and few enough to actually meet with.

And groups should be fluid per skill, not fixed for the year. A child who needs support with fractions may be your strongest with measurement. Fixed ability groups stop reflecting reality within about three weeks.

Plan the Response Before the Assessment

Worth doing once you're in the habit: decide before you assess what each outcome will trigger.

"If more than half miss this, I reteach with the number line on Wednesday. If it's a handful, I pull them Thursday during independent reading."

That's five minutes of planning that turns results into action instead of into a decision you make while tired on Thursday evening.

What the Response Looks Like

Reteaching is teaching. But the practice that follows needs to be targeted to the specific gap, not a general worksheet on the topic.

A child who can't regroup needs regrouping practice, not mixed addition. Worksheets sorted by grade and skill let you match the practice to the diagnosis rather than handing the same page to everyone.

Then check again in a week. If the number moved, it worked. If it didn't, the response was wrong, not the child.

More in formative assessment ideas and self-assessment and goal setting. 💕