diff --git a/step2-05/demo/src/index.tsx b/step2-05/demo/src/index.tsx
index 46b98b1..6c057ce 100644
--- a/step2-05/demo/src/index.tsx
+++ b/step2-05/demo/src/index.tsx
@@ -1,9 +1,6 @@
 import { reducer } from './reducers';
-import { createStore, compose } from 'redux';
+import { createStore } from 'redux';
 
-declare var window: any;
-const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
-
-const store = createStore(reducer, {}, composeEnhancers());
+const store = createStore(reducer);
 
 console.log(store.getState());
diff --git a/step2-05/exercise/src/index.tsx b/step2-05/exercise/src/index.tsx
index 46b98b1..6c057ce 100644
--- a/step2-05/exercise/src/index.tsx
+++ b/step2-05/exercise/src/index.tsx
@@ -1,9 +1,6 @@
 import { reducer } from './reducers';
-import { createStore, compose } from 'redux';
+import { createStore } from 'redux';
 
-declare var window: any;
-const composeEnhancers = window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ || compose;
-
-const store = createStore(reducer, {}, composeEnhancers());
+const store = createStore(reducer);
 
 console.log(store.getState());
diff --git a/step2-06/README.md b/step2-06/README.md
index 23810f5..4ec943a 100644
--- a/step2-06/README.md
+++ b/step2-06/README.md
@@ -4,7 +4,10 @@ Redux: Dispatching Actions and Examining State.
 
 In this step, we learn about `dispatch` and `getState()`. Dispatching action messages to the store is the only means by which to inform the reducers to modify the shared state tree.
 
-We also saw how we may compose the reducers according to the shape
+We also see how we may compose the reducers according to the shape.
+
+If you want a really neat UI to show what the store looks when actions are dispatched to the store, use this Chrome extension:
+https://chrome.google.com/webstore/detail/redux-devtools/lmhkpmbekcpmknklioeibfkpmmfibljd
 
 # Exercise
 
diff --git a/step2-07/README.md b/step2-07/README.md
index 1896379..70824d4 100644
--- a/step2-07/README.md
+++ b/step2-07/README.md
@@ -2,6 +2,14 @@
 
 Connect store to view with `react-redux`. `connect()` is used to turn Redux store and dispatch functions into props inside React components. The state and action dispatchers are passed along with a `<Provider>` component.
 
+```ts
+const NewComponent = function connect(mapStateToProps?, mapDispatchToProps?, mergeProps?, options?)(OldComponent);
+```
+
+The `connect()` function takes in a few functions that maps some portion of the state tree and dispatcher functions as props. It is a **higher order function** meaning that the return value of `connect()` is a function that decorates OldComponents into a NewComponent with all the mapped props.
+
+This `mapStateToProps` function selects out portions of the state tree. This function informs the connected view when to re-render based on a shallow comparison from previous state. 
+
 # Exercise
 
 1. open up `exercise/src/index.tsx` and wrap `<TodoApp>` with `<Provider>` as instructed in the comment