Good, and unusually simple, because there is one secondary and everyone goes to it. Primaries are scattered across the town and the villages around it. Inspection grades across the county come out well. The complication is not quality, it is choice. If your plan involved shortlisting three secondaries and picking the best, that plan does not survive contact with south-east Cornwall.
Ofsted has graded 120 settings across Cornwall, and 95 of them, roughly four in five, sit at good or better. Three are outstanding. Twenty require improvement and five are inadequate. A further 113 settings in the county hold no published grade yet, which is a gap in the record rather than a verdict on them. Those counts cover the whole local authority, not Liskeard specifically, so read them as the weather rather than the forecast for any one school gate.
The secondary question answers itself. Liskeard School and Community College takes the intake for this corner of Cornwall, and there is no realistic second option within daily reach. That is not the disaster it sounds like. It is a large school with an engineering specialism, and the practical effect of having no alternative is that families stop paying a premium to sit inside a particular catchment line, which is exactly the arms race that distorts prices in most of southern England. What you save in stress you spend in acceptance.
At primary, Liskeard Hillfort Primary School on Old Road and St Martin's Church of England Primary School in Lake Lane serve the town itself. Beyond them the pattern is small village primaries, each anchored to its own settlement: St Cleer Primary Academy, Menheniot Primary School, Dobwalls Community Primary School, Darite Primary Academy, Pensilva Primary School, Quethiock Church of England School, Trewidland Primary School, St Neot Community Primary School, Braddock Church of England Primary School and Upton Cross Academy. That spread is the real story. Where you live decides which one is walkable, and in a rural catchment the walkable one is usually the one you get.
Alternative provision exists locally through Caradon Alternative Provision Academy for pupils who cannot attend a mainstream or special school, which is a genuine piece of infrastructure rather than a footnote.
None of this is an admission guarantee. Being near a school and being offered a place at it are different transactions, and the second one is settled by Cornwall Council's allocation rules rather than by your postcode's feelings on the matter. Distance does most of the work in a rural authority, but "most" is not "all", and anyone buying specifically for a named primary should check the current admissions arrangements before exchanging rather than after. The nearest independent schools are in Plymouth and Tavistock, so the private route here is a commute rather than a local decision.
Schools are one of Liskeard's genuine strengths, with the county's inspection record solid and the town's own primaries sitting inside it. The trade is that the secondary decision gets made for you, and most families here find they can live with that.