diff --git a/02_advanced/uebungen/#u09_level-rekursiv/index.html b/02_advanced/uebungen/#u09_level-rekursiv/index.html
index 24650b8..2104a15 100644
--- a/02_advanced/uebungen/#u09_level-rekursiv/index.html
+++ b/02_advanced/uebungen/#u09_level-rekursiv/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="de">
   <head>
     <meta charset="UTF-8" />
@@ -23,6 +23,8 @@
 
       const findDeepestLevel = (arr, currentLevel = 1) => {};
 
+      // Array.isArray()
+
       // Test cases
       console.log(findDeepestLevel([1, [2, [3, [4]], 5]])); // => 4
       console.log(findDeepestLevel([1, 2, 3, 4, 5])); // => 1
diff --git a/02_advanced/uebungen/u08_max-rekursiv/index.html b/02_advanced/uebungen/u08_max-rekursiv/index.html
index 17473c8..f651fcd 100644
--- a/02_advanced/uebungen/u08_max-rekursiv/index.html
+++ b/02_advanced/uebungen/u08_max-rekursiv/index.html
@@ -1,4 +1,4 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="de">
   <head>
     <meta charset="UTF-8" />
@@ -20,9 +20,47 @@
     <script>
       'use strict';
 
-      const findMax = (arr) => {};
+      const findMax2 = (ar) => {
+        if (ar.length === 0) return null;
+        if (ar.length === 1) return ar[0];
+        let max = ar[0];
+        let i = -1;
+        while (++i < ar.length) {
+          if (ar[i] > max) {
+            max = ar[i];
+          }
+        }
+        return max;
+      };
+
+      const findMax = (arr) => {
+        // Basisfall
+        if (arr.length === 0) {
+          return null;
+        }
+
+        if (arr.length === 1) {
+          return arr[0];
+        }
+
+        return Math.max(arr[0], findMax(arr.slice(1))); // Rekursion
+
+        // return arr.length === 0 ? null : arr.length === 1 ? arr[0] : Math.max(arr[0], findMax(arr.slice(1)));
+      };
 
       // Test cases
+      console.time('rekursion max');
+      console.log(findMax([1, 5, 3])); // => 5
+      console.timeEnd('rekursion max');
+
+      console.time('Math.max');
+      console.log(Math.max(...[1, 5, 3]));
+      console.timeEnd('Math.max');
+
+      console.time('for');
+      console.log(findMax2([1, 5, 3]));
+      console.timeEnd('for');
+
       console.log(findMax([1, 5, 3, 9, 2])); // => 9
       console.log(findMax([-10, -20, -3, -4])); // => -3
       console.log(findMax([42])); // => 42
diff --git a/02_advanced/unterricht/tag13/02_promise-aufbau.html b/02_advanced/unterricht/tag13/02_promise-aufbau.html
index 614081a..af49229 100644
--- a/02_advanced/unterricht/tag13/02_promise-aufbau.html
+++ b/02_advanced/unterricht/tag13/02_promise-aufbau.html
@@ -47,7 +47,7 @@
         },
       );
 
-      // Empfholene Schreibweise - then nur für "Erfolg" (resolve) - catch für "Fehler" (reject)
+      // Empfohlene Schreibweise - then nur für "Erfolg" (resolve) - catch für "Fehler" (reject)
       promise
         .then((result) => {
           console.log('OK: ', result);
diff --git a/02_advanced/unterricht/tag13/05_website/assets/css/main.css b/02_advanced/unterricht/tag13/05_website/assets/css/main.css
index b2c406b..2aa9f82 100644
--- a/02_advanced/unterricht/tag13/05_website/assets/css/main.css
+++ b/02_advanced/unterricht/tag13/05_website/assets/css/main.css
@@ -12,7 +12,7 @@
 }
 
 .menu-main {
-  background-color: steelblue;
+  background-color: tomato;
 }
 .menu-main ul {
   list-style: none;
diff --git a/02_advanced/unterricht/tag13/05_website/assets/scss/main.scss b/02_advanced/unterricht/tag13/05_website/assets/scss/main.scss
index 16ac5fc..1b24ef4 100644
--- a/02_advanced/unterricht/tag13/05_website/assets/scss/main.scss
+++ b/02_advanced/unterricht/tag13/05_website/assets/scss/main.scss
@@ -21,7 +21,7 @@
 
 // Menu Main
 .menu-main {
-  background-color: steelblue;
+  background-color: tomato;
   ul {
     list-style: none;
     display: flex;
diff --git a/02_advanced/unterricht/tag14/01_promise-and-readfile/data/products.csv b/02_advanced/unterricht/tag14/01_promise-and-readfile/data/products.csv
new file mode 100644
index 0000000..88b1ce0
--- /dev/null
+++ b/02_advanced/unterricht/tag14/01_promise-and-readfile/data/products.csv
@@ -0,0 +1,4 @@
+name, category, price
+Klingon Letter Opener, Office Warfare, 19.99
+Backpack of Holding, Travel, 29.99
+Tardis Alarmclock, Merchandise, 15.99
diff --git a/02_advanced/unterricht/tag14/01_promise-and-readfile/index.js b/02_advanced/unterricht/tag14/01_promise-and-readfile/index.js
new file mode 100644
index 0000000..36a2c7e
--- /dev/null
+++ b/02_advanced/unterricht/tag14/01_promise-and-readfile/index.js
@@ -0,0 +1,28 @@
+// fs = FileSystem Modul aus der Node Standardbib
+const fs = require('fs'); // commonjs - Node Schreibweise
+
+// Funktion mir einem asynchronen Prozess
+const getContentBy = (path) => {
+  return new Promise((resolve, reject) => {
+    // asynchroner Prozess
+    fs.readFile(path, 'utf-8', (err, data) => {
+      if (err) {
+        // console.error(err);
+        reject(err);
+      }
+      // console.log(data);
+      resolve(data);
+    });
+  });
+};
+
+// Funktionsaufruf einer Funktion mit asynchronem Prozess
+getContentBy('data/productss.csv')
+  .then((data) => {
+    console.log(data);
+  })
+  .catch((err) => {
+    console.error(err);
+  });
+
+console.log('weiter im code...');
diff --git a/02_advanced/unterricht/tag14/01_promise-and-readfile/package.json b/02_advanced/unterricht/tag14/01_promise-and-readfile/package.json
new file mode 100644
index 0000000..5ad39c2
--- /dev/null
+++ b/02_advanced/unterricht/tag14/01_promise-and-readfile/package.json
@@ -0,0 +1,13 @@
+{
+  "name": "01_promise-and-readfile",
+  "version": "1.0.0",
+  "description": "",
+  "license": "ISC",
+  "author": "",
+  "type": "commonjs",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": []
+}
