Disclaimer: many of these websites are suited for learners of all ages, I attached the recommended grade level based on the Virginia SOL (2018).
Kid's Valley Webgarden: Kid's Valley Webgarden provides a plethora of information about the process of gardening. Students are able to use this website to research the importance of nutrients and care that plants need. They can also observe the process of germination and how to do it at home. The site list common gardening plants and the conditions they live best in. Students can use this information to research how the environment plays an important role in plant growth.
Science SOL: K.7, 1.4, 1.7
Glossary of Botanical Terms: Gardenlifepro's glossary can help students understand botanical definition and terminology. During the unit, students can create their own dictionary of words to refer to throughout the unit. This gives them an opportunity to expand their own vocabulary as well as experiencing the importance of prefixes and suffixes
Science SOL: All Grade Levels
Photographic Atlas of Plant Anatomy: this site provides realistic images of plant anatomy, including close-up imagery of plant cells. This image is great to use when trying to show students how plant cells look under a microscope. They can observe the shapes, uniformity (or non-uniformity) of cells. The site also provides images of xylem development, cell walls, and phloem. This is a great tool to use in a virtual classroom if students cannot have hands-on experience in a lab.
Science SOL: 4.6, LS.2, LS.4
Biology of Plants: Created by Missouri Botanical Garden, Biology of Plants is a website that allows students an easy introduction to plant parts, plant development, and their adaptations. The site is suited for early readers and provides additional resources such as lesson plants (for educators), songs to sing too, and additional links to explain how other external factors that play into the role of the plant life cycle.
Science SOL: K.7, 1.4, 1.7, 2.4, 2.5, 2.7, 2.8
Newsela: A great site for students to research contemporary issues such as climate change, deforestation, and other environmental information. The goal of Newsela is to provide factual information for ALL learners regardless of reading levels. It provides text suited for different readers. In terms of plants, they provide articles about abiotic stress, the importance of native plants, and the role of animals in the plant life cycle.
Science SOL: All Grade Levels
Virginia Department of Conservation and Recreation: On a more local level, the DCR is a great resource for students to explore the importance of native plants in Virginia. The DCR presents issues about native species and invasive species in Virginia. This allows students to be presented with local issues and trying to research/solve these problems. This site also provides brochures that divide native species by region (Coastal Plains, Piedmont, Grasslands, Mountains, Riparian). The DCR also provides a Native Plant Finder where students can research how each region has different soils, elevation, hydrology, and climate.
Science SOL: All Grade levels
Plant Virginia Natives: This site provides resources for identifying native plants in Virginia. The site provides a list of local species and their scientific names, plant type, foliage, and the environment they enjoy to grow in. Not only does the site establish the importance of preserving native plant species in Virginia, but it also provides preservation at a local level by region or counties. This research can lead to many great projects, especially if students want to build their own school garden using native species as they research and observe the importance of avoiding invasive species and how native plants are important to local organisms.
Science SOL: All Grade Levels
Virginia Living Musem - Plants: The VLM provides a listing of native species in Virginia. This site is useful for elementary-age students as they can research plant portfolios and environmental preferences.
Science SOL: 1.7
Virginia Department of Forestry: Another great site to talk about local issues in Virginia. The DOF focuses more on forest development, but also talks about invasive species and combating those issues. The DOF website provides additional education resources for all grade levels (and adult education). They include webinars, worksheets, videos, and programs educators can get involved in.
Science SOL: All Grade Levels