Pop-up grammar, and why the two-week grammar unit lost the meta-analysis.

Norris and Ortega ran the biggest meta-analysis on second-language grammar instruction the field has ever seen. Explicit instruction worked. The unit format we all inherited from the eighties did not. The difference is where the grammar lives.

What the meta-analysis actually found

John Norris and Lourdes Ortega collected 49 published studies on L2 grammar instruction from 1980 through 1998 and ran the numbers (Effectiveness of L2 Instruction: A Research Synthesis and Quantitative Meta-Analysis, Language Learning, 2000). The headline finding was that instruction worked. The average effect size for any kind of focused instruction was d = 0.96, which is large in any field that uses effect sizes.

The more interesting finding sat one level down. Explicit instruction (telling students the rule, pointing at the form, making the grammar visible) had an average effect of d = 1.13. Implicit instruction (input flooding, exposure without explanation) averaged d = 0.54. Both worked. Explicit worked roughly twice as well, at least on the post-tests the studies had used.

The caveat the field has spent twenty years arguing about is that the post-tests measured explicit knowledge. Discrete-point tests favor explicit teaching. When researchers used freer, more communicative measures the explicit advantage shrank. It did not disappear. It shrank.

Focus on form versus focus on forms

Mike Long drew the line that the field still uses (Focus on Form: A Design Feature in Language Teaching Methodology, 1991). Two phrases. One letter of difference. They name two completely different ways to teach grammar.

Focus on forms

The traditional unit. Two weeks on the preterite. Worksheets, verb charts, drill. The class is built around the form. Meaning is the wrapper. The students know going in that the goal is to learn the preterite.

Focus on form (singular)

A communicative lesson is the spine. The grammar comes up when it gets in the way. The class is reading a short news story about a soccer goal. A student asks why the verb is metió and not mete. You teach the preterite ending in ninety seconds, point at three more examples in the text, and go back to the story. The grammar got attention. The meaning was never abandoned.

Long's claim, supported by the Norris and Ortega data, is that focus on form does better than focus on forms on freer measures and at least as well on the discrete ones, while keeping the meaning-making engine running.

Focus on form entails a prerequisite engagement in meaning before attention to linguistic features can be expected to be effective.

What pop-up grammar looks like in practice

I run a Spanish 3 class where I have not done a traditional grammar unit in seven years. The students still learn the preterite. They learn it differently.

We read a short story about a kid who broke his mother's favorite plate. The verb forms come up: se cayó, se rompió, no le dije nada. I underline a few. I ask what they notice. Someone says the verbs all end in vowel patterns we have not seen. I write the endings on the board. Two minutes. We go back to the story.

The next class we read a different story with the same endings. I ask three students to retell a moment from the story. The retells use the preterite because the story did. Some forms come out wrong. I recast one or two. We move on.

Three weeks later they are using preterite in their writing. Not because they did fifty drill items. Because the form showed up over and over in meaningful text and we paused to notice it each time.

Why this is hard to sell

Three reasons the unit format will not die.

First, parents and administrators know what a grammar unit looks like. It looks like a worksheet packet with a quiz on Friday. It is legible to people who do not speak the language. A reading-based pop-up week does not produce that artifact.

Second, textbooks are built around grammar units. The scope and sequence is the chapter sequence. If you teach off the textbook you are teaching focus on forms. The textbook publishers know this and resist any restructuring that threatens their TOC.

Third, focus on form requires you to know your grammar cold. You have to be able to teach the preterite ending in ninety seconds when a kid asks at 9:14 on a Tuesday. You cannot outsource that to the textbook's explanation page. New teachers find this scary. Twenty-year teachers find it liberating.

What about the Norris and Ortega caveats

The 2000 paper is the most cited piece of evidence in the explicit-instruction column. Norris and Ortega were careful about it. They flagged three concerns.

Concern one: the studies in their corpus mostly used short interventions and immediate post-tests. We do not know what the long-term retention curves look like. Concern two: outcome measures favored explicit knowledge. Concern three: the variable that mattered most was not explicit versus implicit. It was whether the form was tested in a way the learner had practiced.

That third point is the one most teachers miss. If you teach and test the preterite as a fill-in-the-blank exercise, the students will get good at fill-in-the-blank preterite. That is not the same as being good at the preterite.

What this means for your Monday

Pick one grammar unit in your curriculum that you teach as a two-week block. Rewrite it. Find a story, a song, or a video clip where the target form appears naturally and often. Build the week around the text. When the form comes up, stop, point at it, give the rule in under three minutes, and go back to the meaning.

Repeat with three more texts that use the same form. Make the students notice it each time. Then ask them to use it in a short retell or response.

At the end, give a quiz that asks them to do something with the form: write a one-paragraph story, narrate a picture sequence, respond to a personal question in writing. Not a worksheet. Compare scores with last year's unit. The data will probably not surprise you, because Norris and Ortega already ran the analysis.