This is one of few resources I use “as is.” We follow the plan in Mother of Divine Grace Third Grade Syllabus to the letter. (Wait, not true, I did add in our local species cards for each of the animal classes.) This may be because I’m using it with Big Kid. He’s the one who never needs manipulatives.
The book is workbook sized.
Invertebrates was a REALLY light touch, but we love bugs so I got out our arthropod cards and we learned our local crustaceans, insects, and arachnids (we had a timely brown recluse infestation in my bedroom too…ick!) We also used my Insect Lore models for ladybug, mantis, ant, butterfly, mealworm, and silkworm. We sorted, sequenced, identified them by touch only. Anything to make it interesting. A really little kid came over one day and he just matched the adult bug models to our picture cards.
Oh, and here’s a shot of one of the “tests”. We do them orally.