The phrase "a previous school" is correct and usable in written English.
It can be used when referring to an educational institution that someone attended before their current one.
Example: "Before transferring to this university, I studied at a previous school that offered a different curriculum."
Alternatives: "an earlier school" or "a former school".
We met four years ago at a previous school.
I'd worked with one in a previous school and was very happy with it.
An inquest heard the "kind and caring" teenager with a bright future had moved to Pershore high school after experiencing difficulties at a previous school.
One of the hardest situations she's been in was several years ago, when a student at a previous school made a racist comment towards her.
When she was promoted to a senior role at a previous school, for example, some staff were initially unwilling to accept her leadership position.
Harris told the Tuscaloosa News that her niece had been forced to transfer out of a previous school because of bullying, which prompted her mother and grandmother to complain to the Alabama State Board of Education.
He criticized the Bloomberg administration for "chasing after people who are drinking 32-ounce soft drinks" and, in a reference to a previous schools chancellor, called the chief of the New York City Housing Authority "the Cathie Black of Nycha".
Quite consistent with these findings, in a previous school-based study [14], one-third of children who reported no headaches in questionnaires or interviews reported at least one headache episode in a diary, however, the majority of these were of low intensity.
A previous school-based intervention to examine the effects of changes in playground structure on physical activity 23 demonstrated a small effect size (d=0.10).
Sex differences in WASH provision are of interest in the WASH sector and were found to be present in a previous school-based hand contamination study conducted in this region.
