We found that both timing and persistence do matter, but they have different effects in different learning domains. For vocabulary and reading, early and persistent food insecurity were very detrimental for learning. English and maths were more complex.
For English, early food insecurity didn’t matter as much, but later and persistent food insecurity were linked to poorer learning outcomes. This may reflect that, at the time of the study, English language learning happened later in the curriculum.
For maths, food insecurity at any time was strongly and negatively associated with learning. This may reflect the fact that maths learning at one level is built directly on learning at a previous level. In other words, a child who does not learn basic addition due to food insecurity will struggle with more complex maths. In contrast, for subjects such as reading, once foundational skills are established, some catch-up for missed material may be possible in the short term.