The introduction gives instructions for older students and adults to write the series to aide in learning.
I like this resource. It has a unique approach to teaching another language.
I am somewhat dissatisfied with it in general, however. I will share this to help you decide for your high schooler.
The premise is learn a statement in English while acting it out. Identify the verb. Learn the Spanish word for that verb. Speak the Spanish translation. (acting out throught these steps to reinforce)
My dissatisfaction is mostly in the exercises used. Most of the sentences are not sentences that we (in our family) use. Sometimes a Bible verse is included in the additional exercises at the bottom, which I like. If I did not previously know Spanish at all or have the opportunity to speak Spanish with native speakers, then this book would be fine.
However, I would like my children to learn phrases they would actually use to communicate with the Spanish kids at the soccer field or the guys who work at our farm. My seven year old son is buddies with two of my husband’s employees. I asked him one night if he talks to them in Spanish or English. He said mostly English because he doesn’t know many words in Spanish. He told me he was making them laugh one day by saying “sacapuntas” which means “pencil sharpener,” from the early lessons in Volume 1. So I asked him what he would like to be able to say. He wanted to learn how to say “good morning” and “see you later, alligator.”. :).
Therefore, I would suggest you consider your goals for your son learning Spanish. Also, if you need a foreign language to fulfill high school/ college entrance requirements, you may want to contact the company since it is a non-traditional approach and may or may not meet those requirements.
I don’t want to come across as negative about this resource at all. I just would prefer to learn/teach words which we would use on a daily basis.