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On the Expert ES6 course part 10, the example can template string when saying "hi name".

When destructuring objects, if the intended name of your variable is the same name as the object property name, you can use a simplified syntax...

let {firstName, lastName, message} = args;

This is not only possible, some folks think that this is the good style and recommend not using the more flexible syntax because it doesn't read well and requires the reader to think about syntax instead of just reading the intent of the code.

I think the course should mention this.

I think maybe const should be in the same section as var.

In the Exercise the usage of var is enforced. Very challenging to use destructuring here ;)

In the following example:

function sayHello(){
    this.name = 'hendrik';

    setTimeout(function(){
        console.log('hello ' + this.name);
    }, 1500);
}

sayHello();

Nested function passed in setTimeout has access to name property. Since sayHello() has window as its execution context, it implicitly assigns name property to window, which is again the execution context of the nested function.

The example might be modified like this:

var person = {
    sayHello: function(){
        this.name = 'hendrik';

        setTimeout(function(){
            console.log('hello ' + this.name);
        }, 1500);
    }
}

person.sayHello();

Above code will not error out as there is no operation being performed on this.name