There are many grammatical errors There are many grammatical errors in the book. It doesn't mention a lot of exceptions. So the students have a lot of questions and it's really difficult for the teacher to handle all of them.

Low quality popscience with no integrity I used to love Nat Geo's magazines and read stacks of old issues almost cover to cover back when I assumed that the content was genuine and scientific. The illusion first shattered when I discovered the "Dog Whisperer" TV show that masqueraded abuse as dog training, and saw that Nat Geo just ignored all the damning critique from highly educated actual behaviour specialists, who implored them to stop the show because it is 1. unscientific, and 2. likely to harm many pet dogs as viewers try to emulate Millan's methods from the popular show. Nat Geo continued the show year after year because the show is popular, and because science, ethics and integrity apparently does not matter... all the sciency gloss is just pretend

People handling subscriptions are a disaster Almost a year ago I paid for a subscription to Nat Geo History. Everything was correct, but from day one they got my address INCORRECT and despite all my complaining e-mails, they have continued to do so for almost a FULL YEAR and I have yet to recieve a single copy. They are apparantly unaccountable for such mistakes and are certainly uncaring, or they would had made things right by now. Read the other reviews with people with similar problems. I feel nothing but frustration and anger for such avoidable incompetence and only wish I could be listened to.

Digital membership didnt work; no service Signed up for a paid digital membership: content was good, when I could read it. Every article I tried reading would hit me a paywall popup telling me to subscribe, despite the fact I am was subcribed, logged in, and paying. Sometimes they would go away after waiting a while, sometimes the payway would not go away. Customer service sucks. They don't even respond. Never responded to multiple emails requesting they cancle my membership and stop charging me.. Tired of having my mailbox filled up with stuff I cant read, I clicked unsubscribe. Nat geo site responds 'it may take 10 days' for the system to stop spamming me. 10 days? Hell even junk mail marketing from boner pill salemen will stop immediately when you hit that unsubscribe button.. Nat geo/disney, you suck

Dear CEO and others Dear CEO and others, Your information is very reliable, isn't it? I guess all you think about Africa is that they have no food and no water and they're poor awww so sad. but no, you guys don't have a big enough brain to understand the beauty of Africa, at least explain that and quit the stupidity.