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.

Subscription to spam National Geographic used to be a very respected journal. Now, they teamed up with Lindblad Expeditions. Once you subscribe to National Geographic, they sell your address to Lindblad Expeditions without asking for your permission, and you start getting catalogues of offensively expensive travel offers, tens of thousands of dollars per trip, from Lindblad Expeditions, and it is impossible to stop. Cancelled National Geographic because of Lindblad Expeditions spam. Called National Geographic for help to stop the spam. Looks like the spammers may be their partners. The frequency of spam got less but did not stop. Please, save your sanity and DO NOT SUBSCRIBE TO NATIONAL GEOGRAPHIC!!!

Inspiring Content, but hundreds of ads National Geographic Channel has been a source of awe-inspiring documentaries and educational content. It is my go-to channel to relax. The visuals are stunning, and the storytelling is both informative and engaging. However, the overall experience is marred by the excessive number of advertisements. The frequency and duration of ads interrupt the flow. Sometimes I even forget what I was watching 😀 I understand the importance of ads, but it would be good to balance how often you show them.

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

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.