diff --git a/.changeset/afraid-colts-sneeze.md b/.changeset/afraid-colts-sneeze.md
new file mode 100644
index 0000000000..2c8b9f7501
--- /dev/null
+++ b/.changeset/afraid-colts-sneeze.md
@@ -0,0 +1,5 @@
+---
+"@khanacademy/perseus": patch
+---
+
+Remove simpleValidate from PhET widget
diff --git a/packages/perseus/src/widgets/phet-simulation.tsx b/packages/perseus/src/widgets/phet-simulation.tsx
index 519dd1f27b..77ec064c18 100644
--- a/packages/perseus/src/widgets/phet-simulation.tsx
+++ b/packages/perseus/src/widgets/phet-simulation.tsx
@@ -72,11 +72,6 @@ export class PhetSimulation extends React.Component<Props, State> {
         return Changeable.change.apply(this, args);
     };
 
-    simpleValidate: (arg1: any) => any = (rubric) => {
-        // @ts-expect-error - TS2339 - Property 'validate' does not exist on type 'typeof PhetSimulation'.
-        return PhetSimulation.validate(this.getUserInput(), rubric);
-    };
-
     // kaLocales and PhET locales use different formats and abbreviations.
     // PhET accepts different formats, i.e. kaLocale's hyphens, but it does not accept
     // different abbreviations, so in points of divergence of abbreviations, we need to