diff --git a/src/components/ExpressionSetCard/ExpressionSetCard.stories.tsx b/src/components/ExpressionSetCard/ExpressionSetCard.stories.tsx
index ec45ace..a5fff93 100644
--- a/src/components/ExpressionSetCard/ExpressionSetCard.stories.tsx
+++ b/src/components/ExpressionSetCard/ExpressionSetCard.stories.tsx
@@ -19,5 +19,5 @@ export const Daily = Template.bind({});
 Daily.args = {
   name: "Daily",
   description: "Words for daily practice",
-  word_count: 11,
+  expression_count: 11,
 };
diff --git a/src/components/ExpressionSetCard/ExpressionSetCard.tsx b/src/components/ExpressionSetCard/ExpressionSetCard.tsx
index 0585d57..c2d48c6 100644
--- a/src/components/ExpressionSetCard/ExpressionSetCard.tsx
+++ b/src/components/ExpressionSetCard/ExpressionSetCard.tsx
@@ -1,19 +1,19 @@
 export interface ExpressionSetCardProps {
   name: string;
   description: string;
-  word_count: number;
+  expression_count: number;
 }
 
 export function ExpressionSetCard({
   name,
   description,
-  word_count,
+  expression_count,
 }: ExpressionSetCardProps) {
   return (
     <article className="content-card">
       <h2 className="content-row text-title margin-small">{name}</h2>
       <span className="content-row text-meta margin-small">
-        {word_count} word(s)
+        {expression_count} expressions(s)
       </span>
       <p className="content-row text-details margin-paragraph">{description}</p>
     </article>
diff --git a/src/components/ExpressionSetInfo/ExpressionSetInfo.tsx b/src/components/ExpressionSetInfo/ExpressionSetInfo.tsx
index b7a573c..eda52f3 100644
--- a/src/components/ExpressionSetInfo/ExpressionSetInfo.tsx
+++ b/src/components/ExpressionSetInfo/ExpressionSetInfo.tsx
@@ -5,14 +5,14 @@ export interface ExpressionSetInfo {
   id: number;
   name: string;
   description: string;
-  word_count: number;
+  expression_count: number;
 }
 
 export function ExpressionSetInfo({
   id,
   name,
   description,
-  word_count,
+  expression_count,
 }: ExpressionSetInfo) {
   return (
     <section>
@@ -38,7 +38,7 @@ export function ExpressionSetInfo({
         </Link>
       </h2>
       <span className="content-row text-meta margin-small">
-        {word_count} word(s)
+        {expression_count} expression(s)
       </span>
       <p className="content-row text-details margin-paragraph">{description}</p>
     </section>
diff --git a/src/hooks/useExpressionCategories.ts b/src/hooks/useExpressionCategories.ts
new file mode 100644
index 0000000..2cbb47b
--- /dev/null
+++ b/src/hooks/useExpressionCategories.ts
@@ -0,0 +1,12 @@
+import { Category, Expression, ExpressionId } from "../model";
+import { useExpressionData } from "./useExpressionData";
+
+export function useExpressionCategories(
+  expression_id?: ExpressionId | undefined
+): Category[] {
+  const { categories, expression_to_category } = useExpressionData();
+  const category_ids = expression_to_category
+    .filter((item) => item.expression_id === expression_id)
+    .map((item) => item.category_id);
+  return categories.filter((item) => category_ids.includes(item.id));
+}
diff --git a/src/hooks/useExpressionsInSet.ts b/src/hooks/useExpressionsInSet.ts
new file mode 100644
index 0000000..c10dc8d
--- /dev/null
+++ b/src/hooks/useExpressionsInSet.ts
@@ -0,0 +1,12 @@
+import { Expression, ExpressionSetId } from "../model";
+import { useExpressionData } from "./useExpressionData";
+
+export function useExpressionsInSet(
+  expression_set_id: ExpressionSetId | undefined
+): Expression[] {
+  const { expressions, expression_to_expression_set } = useExpressionData();
+  const expression_ids = expression_to_expression_set
+    .filter((item) => item.expression_set_id === expression_set_id)
+    .map((item) => item.expression_id);
+  return expressions.filter((item) => expression_ids.includes(item.id));
+}
diff --git a/src/hooks/useQueriedExpressionSet.ts b/src/hooks/useQueriedExpressionSet.ts
new file mode 100644
index 0000000..0f2f923
--- /dev/null
+++ b/src/hooks/useQueriedExpressionSet.ts
@@ -0,0 +1,14 @@
+import { useRouter } from "next/router";
+import { ExpressionSet } from "../model";
+import { useExpressionData } from "./useExpressionData";
+
+export function useQueriedExpressionSet(): ExpressionSet | undefined {
+  const { query } = useRouter();
+  const { expression_sets } = useExpressionData();
+  const expression_set_id = Number.parseInt(query["set-id"] as string);
+
+  if (!Number.isInteger(expression_set_id)) {
+    return undefined;
+  }
+  return expression_sets.find((item) => item.id === expression_set_id);
+}
diff --git a/src/hooks/useRandomExpressionInSet.ts b/src/hooks/useRandomExpressionInSet.ts
new file mode 100644
index 0000000..2c8df15
--- /dev/null
+++ b/src/hooks/useRandomExpressionInSet.ts
@@ -0,0 +1,11 @@
+import { Expression, ExpressionSetId } from "../model";
+import { sample } from "../util/array-utils";
+import { useExpressionsInSet } from "./useExpressionsInSet";
+
+export function useRandomExpressionInSet(
+  expression_set_id: ExpressionSetId | undefined
+): Expression | undefined {
+  const expressions = useExpressionsInSet(expression_set_id);
+  if (expressions.length === 0) return undefined;
+  return sample(expressions);
+}
diff --git a/src/pages/expression-sets/details.tsx b/src/pages/expression-sets/details.tsx
index 8d0a3af..ba4c04f 100644
--- a/src/pages/expression-sets/details.tsx
+++ b/src/pages/expression-sets/details.tsx
@@ -1,33 +1,22 @@
 import type { NextPage } from "next";
 import Link from "next/link";
-import { useRouter } from "next/router";
 import { ExpressionSetInfo } from "../../components/ExpressionSetInfo/ExpressionSetInfo";
 import { Page } from "../../components/Page";
-import { useExpressionData } from "../../hooks/useExpressionData";
+import { useExpressionsInSet } from "../../hooks/useExpressionsInSet";
+import { useQueriedExpressionSet } from "../../hooks/useQueriedExpressionSet";
+import { PageWithError } from "../../views/PageWithError/PageWithError";
 
 const ExpressionSetDetailsPage: NextPage = () => {
-  const { query } = useRouter();
-  const { expression_sets, expression_to_expression_set } = useExpressionData();
+  const expression_set = useQueriedExpressionSet();
+  const expressions = useExpressionsInSet(expression_set?.id);
 
   // Fallback for expression set not found
-  const expression_set_id = Number.parseInt(query["set-id"] as string);
-  const expression_set = expression_sets.find(
-    (item) => item.id === expression_set_id
-  );
-  if (!expression_set)
-    return (
-      <Page>
-        <div className="page-with-padding scroll">
-          <p className="text-details">Expression set not found</p>
-        </div>
-      </Page>
-    );
+  if (!expression_set) {
+    return <PageWithError message="Expression set not found" />;
+  }
 
-  // Fallback for expression set empty TODO fix style
-  const word_count = expression_to_expression_set.filter(
-    (item) => item.expression_set_id === expression_set.id
-  ).length;
-  if (!word_count)
+  // Fallback for expression set empty
+  if (expressions.length === 0)
     return (
       <Page>
         <div className="page-with-padding scroll">
@@ -35,7 +24,7 @@ const ExpressionSetDetailsPage: NextPage = () => {
             id={expression_set.id}
             name={expression_set.name}
             description={expression_set.description}
-            word_count={word_count}
+            expression_count={expressions.length}
           />
           <p className="text-details">No expressions left in this set.</p>
         </div>
@@ -50,7 +39,7 @@ const ExpressionSetDetailsPage: NextPage = () => {
             id={expression_set.id}
             name={expression_set.name}
             description={expression_set.description}
-            word_count={word_count}
+            expression_count={expressions.length}
           />
         </section>
         <section className="navigation-bottom">
diff --git a/src/pages/expression-sets/index.tsx b/src/pages/expression-sets/index.tsx
index ec09738..a3723fe 100644
--- a/src/pages/expression-sets/index.tsx
+++ b/src/pages/expression-sets/index.tsx
@@ -3,38 +3,47 @@ import Link from "next/link";
 import { ExpressionSetCard } from "../../components/ExpressionSetCard";
 import { Page } from "../../components/Page";
 import { useExpressionData } from "../../hooks/useExpressionData";
+import { useExpressionsInSet } from "../../hooks/useExpressionsInSet";
+import { ExpressionSet } from "../../model";
 
 const ExpressionSetListPage: NextPage = () => {
-  const { expression_sets, expression_to_expression_set } = useExpressionData();
+  const { expression_sets } = useExpressionData();
 
   return (
     <Page>
       <div className="page-with-padding content-list scroll">
         {expression_sets.map(({ id, name, description }) => (
-          <Link
+          <ExpressionSetLink
             key={id}
-            href={{
-              pathname: "/expression-sets/details",
-              query: { "set-id": id },
-            }}
-            passHref
-          >
-            <a>
-              <ExpressionSetCard
-                name={name}
-                description={description}
-                word_count={
-                  expression_to_expression_set.filter(
-                    (item) => item.expression_set_id === id
-                  ).length
-                }
-              />
-            </a>
-          </Link>
+            id={id}
+            name={name}
+            description={description}
+          />
         ))}
       </div>
     </Page>
   );
 };
 
+function ExpressionSetLink({ id, description, name }: ExpressionSet) {
+  const expressions = useExpressionsInSet(id);
+  return (
+    <Link
+      href={{
+        pathname: "/expression-sets/details",
+        query: { "set-id": id },
+      }}
+      passHref
+    >
+      <a>
+        <ExpressionSetCard
+          name={name}
+          description={description}
+          expression_count={expressions.length}
+        />
+      </a>
+    </Link>
+  );
+}
+
 export default ExpressionSetListPage;
diff --git a/src/pages/expression-sets/practice.tsx b/src/pages/expression-sets/practice.tsx
index 0ce6dfb..53cbda9 100644
--- a/src/pages/expression-sets/practice.tsx
+++ b/src/pages/expression-sets/practice.tsx
@@ -1,86 +1,86 @@
 import type { NextPage } from "next";
 import Link from "next/link";
 import { useRouter } from "next/router";
+import { useState } from "react";
 import { ExpressionCard } from "../../components";
 import { Page } from "../../components/Page";
-import { useExpressionData } from "../../hooks/useExpressionData";
-import { sample } from "../../util/array-utils";
-import {
-  getCategoriesInExpression,
-  getExpressionsInSet,
-} from "../../util/data-utils";
+import { useExpressionCategories } from "../../hooks/useExpressionCategories";
+import { useQueriedExpressionSet } from "../../hooks/useQueriedExpressionSet";
+import { useRandomExpressionInSet } from "../../hooks/useRandomExpressionInSet";
+import { Category, Expression } from "../../model";
+import { PageWithError } from "../../views/PageWithError/PageWithError";
 
-const ExpressionSetListPage: NextPage = () => {
-  const { query, pathname } = useRouter();
-  const {
-    expressions,
-    categories,
-    expression_sets,
-    expression_to_expression_set,
-    expression_to_category,
-  } = useExpressionData();
+// Do random selection here so we don't keep flipping states with interaction
+const ExpressionPracticePage: NextPage = () => {
+  const expression_set = useQueriedExpressionSet();
+  const expression = useRandomExpressionInSet(expression_set?.id);
+  const categories = useExpressionCategories(expression?.id);
 
-  // Fallback for expression set not found
-  const expression_set = expression_sets.find(
-    (item) => item.id === Number.parseInt(query["set-id"] as string)
-  );
-  if (!expression_set)
-    return (
-      <Page>
-        <p className="text-details">Expression set not found</p>
-      </Page>
-    );
-
-  // Fallback for expression not found
-  const expression_candidates = getExpressionsInSet({
-    expression_set_id: expression_set.id,
-    expression_to_expression_set,
-    expressions,
-  });
-
-  if (expression_candidates.length === 0) {
-    return (
-      <Page>
-        <p className="text-details">No expressions left in this set</p>
-      </Page>
-    );
+  // Fallback views for expression set content not found
+  if (!expression_set) {
+    return <PageWithError message="Expression set not found" />;
   }
+  if (!expression) {
+    return <PageWithError message="No expressions left in this set" />;
+  }
+  return (
+    <ExpressionCardPracticeView
+      key={expression.id}
+      expression={expression}
+      categories={categories}
+    />
+  );
+};
 
-  // Choose word and find categories
-  // Find categories
-  const expression = sample(expression_candidates);
-  const expression_categories = getCategoriesInExpression({
-    categories,
-    expression_id: expression.id,
-    expression_to_category,
-  });
+interface ExpressionCardPracticeViewProps {
+  expression: Expression;
+  categories: Category[];
+}
 
+// Handle internal state here
+function ExpressionCardPracticeView({
+  expression,
+  categories,
+}: ExpressionCardPracticeViewProps) {
+  const { query, pathname } = useRouter();
+  const [revealed, setRevealed] = useState(false);
   return (
     <Page>
       <div className="page-with-bottom-navigation">
         <section className="padding-small scroll">
           <ExpressionCard
             prompt={expression.prompt}
-            categories={expression_categories.map((category) => category.name)}
+            categories={categories.map((category) => category.name)}
             description={expression.description}
-            show_description
+            show_description={revealed}
           />
         </section>
         <section className="navigation-bottom">
-          <Link href={{ pathname, query }} passHref>
-            <a className="navigation-item-bottom text-navigation grow">
-              <div>wrong</div>
-            </a>
-          </Link>
-          <Link href={{ pathname, query }} passHref>
-            <a className="navigation-item-bottom text-navigation grow">
-              <div>right</div>
-            </a>
-          </Link>
+          {revealed ? (
+            <>
+              <Link href={{ pathname, query }} passHref>
+                <a className="navigation-item-bottom text-navigation grow">
+                  <div>Wrong</div>
+                </a>
+              </Link>
+              <Link href={{ pathname, query }} passHref>
+                <a className="navigation-item-bottom text-navigation grow">
+                  <div>Right</div>
+                </a>
+              </Link>
+            </>
+          ) : (
+            <button
+              className="navigation-item-bottom text-navigation grow"
+              onClick={() => setRevealed(true)}
+            >
+              Reveal
+            </button>
+          )}
         </section>
       </div>
     </Page>
   );
-};
+}
 
-export default ExpressionSetListPage;
+export default ExpressionPracticePage;
diff --git a/src/styles/components.css b/src/styles/components.css
index 73c1f1c..8b31d83 100644
--- a/src/styles/components.css
+++ b/src/styles/components.css
@@ -93,6 +93,14 @@
   height: 64px;
 }
 
+.navigation-item:hover {
+  background-color: antiquewhite;
+}
+
+.navigation-item.active {
+  background-color: bisque;
+}
+
 .navigation-item-bottom {
   display: flex;
   flex-shrink: 0;
@@ -105,11 +113,11 @@
   height: 80px;
 }
 
-.navigation-item:hover {
+.navigation-item-bottom:hover {
   background-color: antiquewhite;
 }
 
-.navigation-item.active {
+.navigation-item-bottom.active {
   background-color: bisque;
 }
 
diff --git a/src/views/PageWithError/PageWithError.tsx b/src/views/PageWithError/PageWithError.tsx
new file mode 100644
index 0000000..440e24c
--- /dev/null
+++ b/src/views/PageWithError/PageWithError.tsx
@@ -0,0 +1,15 @@
+import { Page } from "../../components/Page";
+
+export interface PageWithErrorProps {
+  message: string;
+}
+
+export function PageWithError({ message }: PageWithErrorProps) {
+  return (
+    <Page>
+      <div className="page-with-padding">
+        <p className="text-meta">{message}</p>
+      </div>
+    </Page>
+  );
+}
diff --git a/src/views/PageWithError/index.ts b/src/views/PageWithError/index.ts
new file mode 100644
index 0000000..1ac8772
--- /dev/null
+++ b/src/views/PageWithError/index.ts
@@ -0,0 +1 @@
+export * from "./PageWithError";