diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c2658d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+node_modules/
diff --git a/01_simple/index.ts b/01_simple/index.js
similarity index 100%
rename from 01_simple/index.ts
rename to 01_simple/index.js
diff --git a/03_more_options/Readme.md b/03_more_options/Readme.md
new file mode 100644
index 0000000..085d8a9
--- /dev/null
+++ b/03_more_options/Readme.md
@@ -0,0 +1,35 @@
+# Другие настройки
+
+Откройте файл **tsconfig.json**
+
+## Настройка strict
+
+- Запустите команду **tsc**
+
+> Убедитесь что ошибок типизации нет
+
+- Выставьте strict = true
+
+- Повторите команду **tsc**
+
+> В терминале должны появиться ошибки
+
+![call error](../assets/03.png)
+
+Подробнее [почитайте](https://www.typescriptlang.org/tsconfig/#strict) об этой настройке
+
+2. Настройки **sourceMap** и **declaration**
+
+```json
+{
+  "compilerOptions": {
+    "declaration": true,
+    "sourceMap": true
+  }
+}
+```
+
+* Обратите внимание какие файлы появляются в **dist** кроме **.js**
+
+> Посмотрите что именно в них написано и откуда эта информация появляется
+
diff --git a/03_more_options/dist/index.js b/03_more_options/dist/index.js
index 1ffed85..9d29eb0 100644
--- a/03_more_options/dist/index.js
+++ b/03_more_options/dist/index.js
@@ -1,6 +1,7 @@
 import { add } from './utils';
 const a = 1;
-const b = 2;
+const b = "2";
 const c = 3;
-console.info(add(a, b));
+console.info(add(a, parseInt(b)));
+console.log(add.call(undefined, a, b));
 //# sourceMappingURL=index.js.map
\ No newline at end of file
diff --git a/03_more_options/dist/index.js.map b/03_more_options/dist/index.js.map
index 36b297c..6d2a45b 100644
--- a/03_more_options/dist/index.js.map
+++ b/03_more_options/dist/index.js.map
@@ -1 +1 @@
-{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,GAAG,EAAE,MAAM,SAAS,CAAC;AAE9B,MAAM,CAAC,GAAW,CAAC,CAAC;AACpB,MAAM,CAAC,GAAW,CAAC,CAAC;AACpB,MAAM,CAAC,GAAG,CAAC,CAAC;AAEZ,OAAO,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,CAAC,CAAC,CAAA"}
\ No newline at end of file
+{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,GAAG,EAAE,MAAM,SAAS,CAAC;AAE9B,MAAM,CAAC,GAAG,CAAC,CAAC;AACZ,MAAM,CAAC,GAAG,GAAG,CAAC;AACd,MAAM,CAAC,GAAG,CAAC,CAAC;AAEZ,OAAO,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,EAAE,QAAQ,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC;AAElC,OAAO,CAAC,GAAG,CACP,GAAG,CAAC,IAAI,CAAC,SAAS,EAAE,CAAC,EAAE,CAAC,CAAC,CAC5B,CAAA"}
\ No newline at end of file
diff --git a/03_more_options/src/index.ts b/03_more_options/src/index.ts
index 6d1ef2e..dd0a249 100644
--- a/03_more_options/src/index.ts
+++ b/03_more_options/src/index.ts
@@ -1,7 +1,11 @@
 import { add } from './utils';
 
-const a: number = 1;
-const b: number = 2;
+const a = 1;
+const b = "2";
 const c = 3;
 
-console.info(add(a, b))
+console.info(add(a, parseInt(b)));
+
+console.log(
+    add.call(undefined, a, b)
+)
diff --git a/03_more_options/test.js b/03_more_options/test.js
index 74b6421..e058f1e 100644
--- a/03_more_options/test.js
+++ b/03_more_options/test.js
@@ -1,4 +1,4 @@
-// @ts-check
+// @ts-check-off
 import { add } from './dist/utils'
 
 add(1, '2')
diff --git a/04_lint/Readme.md b/04_lint/Readme.md
new file mode 100644
index 0000000..6f38db4
--- /dev/null
+++ b/04_lint/Readme.md
@@ -0,0 +1,28 @@
+# Lint
+
+Установите зависимости
+
+```shell
+npm ci
+```
+
+Запуустите команду проверки
+
+```shell
+npm run eslint
+```
+
+> Обратите внимание на ошибки в терминале
+
+* Откройте файлы с ошибками и устраните их
+
+> Обратите внимание что настройки eslint для javascript не всегда корректно работают с typeescript
+
+![js eslint ignore problem](../assets/04.png)
+
+> Поменяйте директиву на подходящую для **typeescript**
+```
+eslint-disable-next-line @typescript-eslint/no-unused-vars
+```
+
+> Ошибка ушла
diff --git a/04_lint/example.ts b/04_lint/example.ts
index 49b1c10..6dd586e 100644
--- a/04_lint/example.ts
+++ b/04_lint/example.ts
@@ -5,4 +5,5 @@ const summ = (a, b) => {
     return a + b;
 }
 
+// eslint-disable-next-line no-unused-vars
 const boysAndGirls = summ(boys, girls);
diff --git a/04_lint/package.json b/04_lint/package.json
index c7735ae..406cdaf 100644
--- a/04_lint/package.json
+++ b/04_lint/package.json
@@ -3,7 +3,7 @@
   "version": "1.0.0",
   "main": "index.js",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "lint": "eslint ."
   },
   "keywords": [],
   "author": "",
diff --git a/05_error/Readme.md b/05_error/Readme.md
new file mode 100644
index 0000000..dfa5468
--- /dev/null
+++ b/05_error/Readme.md
@@ -0,0 +1,25 @@
+# Ошибки
+
+> Откройте [пример](./animals.ts)
+
+* запустите typesscript
+
+```shell
+tsc
+```
+
+> Запустите полученный javascript файл
+
+```shell
+node ./animal.js
+```
+
+> Обратите внимание на ошибку при запуске
+
+![ts error](../assets/05.png)
+
+> Определите почему именно возникла ошибка
+
+> Обратите внимание что typescript не указал на ошибку до runtime
+
+[Полезные ссылки](./links.md)
diff --git a/05_error/animals.js b/05_error/animals.js
deleted file mode 100644
index b9a93e3..0000000
--- a/05_error/animals.js
+++ /dev/null
@@ -1,40 +0,0 @@
-var __extends = (this && this.__extends) || (function () {
-    var extendStatics = function (d, b) {
-        extendStatics = Object.setPrototypeOf ||
-            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
-            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
-        return extendStatics(d, b);
-    };
-    return function (d, b) {
-        if (typeof b !== "function" && b !== null)
-            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
-        extendStatics(d, b);
-        function __() { this.constructor = d; }
-        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-    };
-})();
-var Animal = /** @class */ (function () {
-    function Animal() {
-    }
-    return Animal;
-}());
-var Dog = /** @class */ (function (_super) {
-    __extends(Dog, _super);
-    function Dog() {
-        return _super !== null && _super.apply(this, arguments) || this;
-    }
-    Dog.prototype.bark = function () { };
-    return Dog;
-}(Animal));
-var Cat = /** @class */ (function (_super) {
-    __extends(Cat, _super);
-    function Cat() {
-        return _super !== null && _super.apply(this, arguments) || this;
-    }
-    Cat.prototype.meow = function () { };
-    return Cat;
-}(Animal));
-var cage1 = [new Dog(), new Dog()];
-var cage2 = cage1; // ok
-cage2.push(new Cat()); // ok
-cage1.forEach(function (dog) { return dog.bark(); }); // ok
diff --git a/06_complex/Readme.md b/06_complex/Readme.md
new file mode 100644
index 0000000..b28cee4
--- /dev/null
+++ b/06_complex/Readme.md
@@ -0,0 +1,3 @@
+# Разберите приведённые примеры
+
+> обратите внимание как применяется infer
\ No newline at end of file
diff --git a/06_complex/infer.ts b/06_complex/infer.ts
index 9783342..caba1b5 100644
--- a/06_complex/infer.ts
+++ b/06_complex/infer.ts
@@ -14,4 +14,4 @@ const double = (x: number, s: 'foo') => x * 2;
 // get type of first argument of function
 type GetFirstFuncArg<Arg> = Arg extends (a, x: infer T) => any ? T : never;
 
-type DoubleArgType = GetFirstFuncArg<typeof double>
\ No newline at end of file
+type DoubleArgType = GetFirstFuncArg<typeof double>
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new file mode 100644
index 0000000..c753c2f
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diff --git a/assets/05.png b/assets/05.png
new file mode 100644
index 0000000..09f032a
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