The internet is a rich resource for entomology, with many cooperative extension programs featuring informative websites, and for identification, apps like iNaturalist are excellent starting points.
Mini Beasts Info Graphic (K-12)
Pictorial Dichotomous Key (3-12)
Identify an Insect (K-12)
Conservation of Insects (K-12)
Mouthparts Mayhem - experiment to learn about different insect mouth parts. (K-5)
Can you build an exoskeleton? - Learn about exoskeletons (K-5)
Maggot Art - Yup, use maggots to create art... or rather, let THEM create art (K-12)
Want to be an entomologist? (6-12)
Insect Facts - Body Parts (K-12)