This density of the writing and concepts being explained is confusing for adults let alone school pupils.
what has happened to diagrams and children learning to their strengths? For example: those more visually inclined can understand a diagram well, but there are ways to make a diagram work for the more auditory inclined like a song sequence and for those more kinaesthetically inclined, this a movement sequence. Fit the learning to the pupil not the pupil to the dense array of words.
The text book (and that is being polite)!! can be used to make the lesson teachable but not as the "faucet" of knowledge that all pupils have drink from, puke after and the education dept carry on regardless.. A block of goobledegluk, 'tis. (and that is not Shakespeare, by the way)!!!
We learn by use of our senses but education tries to force us all into a rigid tube of learning. No wonder it fails and good persons like
@Mel dCP get cars and handbags vandalised. The kids are frustrated because they cannot learn.
This is your chance
@Mel dCP: the restless, cannot sit still ones up the back are probably kinaesthetic, they learn by movement and rhythm, The ones that tilt their head to listen more and have sing song voices are preferably auditory so learn from rhyme sounds, song sequences and the prefer visual are up the front to see, and not be distracted by others, do not like movement of what they are looking at and learn by looking.
The method is just as important as the content. three different learning modalities for a sequential diagrams
Food in (like crops a etc)--> digestion --> glucose (fuel) to liver (Big Factory ? with a Big Controller) --> fuel storage
...........................................insulin (the gatekeeper) added --> sugar (fuel) into cells, including muscle and muscle fuel depot
Brain and liver are gatekeeper exempt /Why? etc etc. Have fun !!!
I would love to attend The "disease derby"! what is the bogey bacteria, the virus villain and the frightening fungus !!!