diff --git a/1-js/09-classes/02-class-inheritance/1-class-constructor-error/solution.md b/1-js/09-classes/02-class-inheritance/1-class-constructor-error/solution.md
@@ -1,6 +1,6 @@
-That's because the child constructor must call `super()`.

-Here's the corrected code:

```js run
class Animal {
@@ -21,7 +21,7 @@ class Rabbit extends Animal {
}

*!*
-let rabbit = new Rabbit("White Rabbit"); // ok now
*/!*
-alert(rabbit.name); // White Rabbit
```
diff --git a/1-js/09-classes/02-class-inheritance/2-clock-class-extended/source.view/index.html b/1-js/09-classes/02-class-inheritance/2-clock-class-extended/source.view/index.html
@@ -7,7 +7,7 @@
  clock.start();


-  /* Your class should work like this: */

  /*


diff --git a/1-js/09-classes/02-class-inheritance/2-clock-class-extended/task.md b/1-js/09-classes/02-class-inheritance/2-clock-class-extended/task.md
@@ -2,14 +2,14 @@ importance: 5

---

-# Extended clock

-We've got a `Clock` class. As of now, it prints the time every second.


[js src="source.view/clock.js"]

-Create a new class `ExtendedClock` that inherits from `Clock` and adds the parameter `precision` -- the number of `ms` between "ticks". Should be `1000` (1 second) by default.

-- Your code should be in the file `extended-clock.js`
-- Don't modify the original `clock.js`. Extend it.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -7,7 +7,7 @@
		clock.start();


		/* Your class should work like this: */

		/*

Expand Down